1. I think the effectiveness depends on the niche. It is a tough question to answer. It is best to use each of the methods and if you can segment out when you do each of the linking methods you might be able to get a clue about which methods work best for your niche. I will add that blog comments do add a very positive component – more diversity in the linking domains. Sure, they are no follow backlinks but there might not be a better way to get links from hundreds of different domains.

If you're serious about making money online, start a blog. Blogging is one of the easiest and most sustainable income sources. As long as the blog is setup the right way, in the right niche, with the right content targeted at the right audience, and the offer is complementary to the content, you could make a tremendous amount of passive income from a blog.
As an affiliate for Boatbookings, you will receive 20% of their revenue - effectively meaning your commission will be about 4% of any sales from your referrals.  You also receive 10% of any commissions Boatbookings make on repeat customers who were your referrals. They do have a minimum charter value of 3,000 ($/€/£/etc) before commissions are earned.
The internet offers boundless possibilities for earning a living online. Upwork and Freelancers Union found that 35% of the American workforce was doing some type of freelance work in 2016, and 73% said technology made it easier to find that work. One of the ways to harness the internet as an income source is pursuing affiliate marketing. It’s intended as a way to generate passive income, but does it really work? Let’s consider. 
As well as selling your eBooks, Amazon can also create paperback copies of your book. CreateSpace, an Amazon-owned company, will help you self-publish your book. A relatively straightforward process, you must upload your work to CreateSpace and submit it for review. Your book will then be displayed on Amazon, and printed on demand and shipped by CreateSpace when purchased. And you can collect up to 70% royalties for each book sold.
With apps being constantly developed, competent app developers are in high demand. Again, if you have the experience or skills to create successful apps then this could be something you could end up working on as a full-time freelancer. Check out adverts for developers on Toptal, a higher paying jobs site for experienced freelancers wanting to make money online.
Regarding “convincing someone to buy your product is not that easy”, I do agree with you, but at the same time, I remember all those products I’ve bought online. I did not search on Google for those products neither I went to the company websites to get information and buy. They were affiliate people and their blogs that inspired to buy them. PrettyLink Pro, SEO Pressor was recommended by Kimberley, I bought Profits Theme, WP Zon builder because Alex Whaley recommended. Similarly I bought CommentLuv Premium because Ileane, Kavita, Steve and many others were talking good about it.
Do Paul! Affiliate marketing is awesome – and you’re right, it can be overwhelming b/c it can be hard to know who to trust, but it’s a wonderful way to make money online — esp when you’re promoting products/services you are proud of. Let me know if you have any questions. There’s a lot I don’t know … and a lot I do. For what I don’t know, I can find the answer for you.
The frequency and method of payment vary as well. Most programs pay their affiliates monthly, although a few pay more frequently. Some require that affiliate earnings reach a specific threshold, which can be as low as $25 or as high as $100. Some programs don't have a threshold. There are programs that pay through direct deposit into your bank, but a vast number pay through PayPal.
If you’re willing to take on some risk and have the heart of a true hustler, you can make extra money online doing commission-only sales for startups and other businesses. While you won’t be getting a regular salary, with the right sales strategies and skills as an inside sales rep, you can make decent money for each sale you bring in. And because you’ll most likely be working with startups, if you can negotiate a little equity you could profit big time if you're pitching a solid product and the startup succeeds.
Most businesses require startup fees as well as a cash flow to finance the products being sold. However, affiliate marketing can be done at a low cost, meaning you can get started quickly and without much hassle. There are no affiliate program fees to worry about and no need to create a product. Beginning this line of work is relatively straightforward.
I haven’t added a new article since mid October.  I have three written and ready to post but I thought it would be an interesting experiment to stop adding content.  I do get about 1-2 comments per week from visitors that ask questions about products.  That takes about 15 minutes per week.  I have added a few links since October but only about one link every two weeks.

Thanks for reigniting my spirit bro. Affiliate marketing is the game changer when it comes to making money on your blog.I neglected it at the start but now i really see it as a necessity. In 5 months i have earned twice waht i made with PPC(Adsense) to be precise. Selling poducts and getting commisions brings the highest cash. Will be around some other time to check out your write ups. Hope to see you on my blig some day too. Cheers.
Some subjects are much better paid than others, so although you may love the idea of writing about travel (badly paid) a better bet would be a niche like finance (much higher rates of pay). Check out the Pro Blogger job board for high paid freelance writing jobs – other places to look might be Textbroker or you can look at the “gigs” section on Craigslist.

So, I put together a free master course for you to take that spreads out all of the work involved in starting a blog, into a series of action-packed lessons. My free course breaks the entire process of starting a blog down into an incredibly simple 7-day process for going from 0 to publishing (and promoting) your first blog post in just 1 week. I can't recommend it enough.

When was the last time you went to a new restaurant without looking it up online beforehand? Or bought a product that didn’t have at least a few 5-star reviews? It seems like more and more our world is run on reviews. And you can make money online by writing them. Get started by creating accounts on sites like Vindale research, Software Judge, FameBit, CrowdTap, Influence Central, and Modern Mom. However, before you run off and start writing, be sure to check the small print on each of these sites. Writing reviews isn’t a huge source of guaranteed income and you want to make sure that it’s worth your time before you get going.
If you're ready to enter the ecommerce fray, you could sell your own stuff. Of course, along with selling your own stuff on your own website comes a whole slew of both responsibilities and technical configuration and requirements. For starters, you'll need a website and a hosting account. You'll also need a merchant account like ones offered by Stripe or PayPal. Then you'll need to design that site, build a sales funnel, create a lead magnet and do some email marketing.
Since you’re essentially a freelancer, you get ultimate independence in setting your own goals, redirecting your path when you feel so inclined, choosing the products that interest you, and even determining your own hours. This convenience means you can diversify your portfolio if you like or focus solely on simple and straightforward campaigns. You’ll also be free from company restrictions and regulations as well as ill-performing teams.

Some merchants run their own (in-house) affiliate programs using dedicated software, while others use third-party intermediaries to track traffic or sales that are referred from affiliates. There are two different types of affiliate management methods used by merchants: standalone software or hosted services, typically called affiliate networks. Payouts to affiliates or publishers can be made by the networks on behalf of the merchant, by the network, consolidated across all merchants where the publisher has a relationship with and earned commissions or directly by the merchant itself.

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