Cookie stuffing involves placing an affiliate tracking cookie on a website visitor's computer without their knowledge, which will then generate revenue for the person doing the cookie stuffing. This not only generates fraudulent affiliate sales but also has the potential to overwrite other affiliates' cookies, essentially stealing their legitimately earned commissions.
3. Joining a community – Some programs house an exclusive private community of like-minded people. A community where you can share ideas, collaborate and empower each other on your collective online journey. This alone is worth its weight in gold. Help is always just around the corner and you will be motivated by fellow members to persevere and keep going no matter how you feel!
An affiliate marketing program is a lot of work, and in most situations there's a lot of competition so you're not going to be bringing in money immediately. Business owners and entrepreneurs suppose that all you need do is setup a site and choose an affiliate to associate with and then just let it run its course. But according to Three Ladders Marketing, only 0.6% of affiliate marketers surveyed have been in the game since 2013. That means that affiliate marketing takes time and effort to build and make money.
Affiliates were among the earliest adopters of pay per click advertising when the first pay-per-click search engines emerged during the end of the 1990s. Later in 2000 Google launched its pay per click service, Google AdWords, which is responsible for the widespread use and acceptance of pay per click as an advertising channel. An increasing number of merchants engaged in pay per click advertising, either directly or via a search marketing agency, and realized that this space was already occupied by their affiliates. Although this situation alone created advertising channel conflicts and debates between advertisers and affiliates, the largest issue concerned affiliates bidding on advertisers names, brands, and trademarks.[35] Several advertisers began to adjust their affiliate program terms to prohibit their affiliates from bidding on those type of keywords. Some advertisers, however, did and still do embrace this behavior, going so far as to allow, or even encourage, affiliates to bid on any term, including the advertiser's trademarks. 

Over the last 20 years, I have seen lots of training courses. I agree with most of your experts. Site Build It was the first good training course I took shortly after Ken Envoy launched it. I have gone the Affiliorama route and thought it was a good program for beginners. At the time I took the course, there weren’t many options for niches. I have heard good things about Chris Farrell’s program but personally have not taken it. Wealthy Affiliate is by far the best program. Members learn to build an online business regardless of the niche(s) they select. Wealthy Affiliate also has a very strong support system in place. The active community of members means people can get their questions answered quickly.
In 2006, the most active sectors for affiliate marketing were the adult gambling, retail industries and file-sharing services.[17]:149–150 The three sectors expected to experience the greatest growth are the mobile phone, finance, and travel sectors.[17] Soon after these sectors came the entertainment (particularly gaming) and Internet-related services (particularly broadband) sectors. Also several of the affiliate solution providers expect to see increased interest from business-to-business marketers and advertisers in using affiliate marketing as part of their mix.[17]:149–150

I got a question about the funnel. You were talking about the first page to be a blog page. I interpreted it as having you own blog(website), that should compete with other expert website. I was wondering if the first step of your funnel can be the opt-in page. The blogs that refers to the opt-in page are guestblogposts on expert websites, so multiple ways of traffic and seo. So you are only building an opt-in page, thank you page, landing pages etc on your website, but no blog to become an expert. Is that something you can do? Or is that not Google friendly or most expert websites are against?

After being accepted into an affiliate program, marketers receive a unique URL that includes their affiliate ID. They share that unique URL with their subscribers, site visitors, and social networks via text links or ads. When someone clicks on that link, affiliate software records that click and any resulting product sales in the affiliate’s account. When commissions reach a pre-determined threshold, the affiliate is paid. 
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