And you said that you can't find any payment proof. It's better you do research again by searching the terms like Wealthy Affiliate payment proofs then you can find plenty of payment proofs posted by WA members. However, those who are earning from other websites, from other niches, they will definitely not post the payment proofs because there is no reason to post the payment proofs of earnings from AdSense or Amazon or such kinds of companies. However, if you want the payment proofs, provide us your email address, we can send you the plenty of payment proofs where you can find out we are earning $15,000+ per month.
You can do the marketing of anything through your that site. Wealthy Affiliate teaches you to make the site in your own subject of interest, in your own niche and drive traffic into that site and making money out of it. So, that is not limited to anything. You use that site for any purpose, to market anything. That is why we have said through Wealthy Affiliate we can learn to earn from our own website, from the companies like eBay, Amazon Google Adsense etc., and many more. So, we have used "etc." and "many more" which means there are still much more things you can do. Hope now you understand.
One course that will really help you is the course of mastering social engagement. Social media is the best way to succeed in affiliate sales. Once you take this course, you will learn how to get the most success by creating great content and conversions. You will also learn how to keep scaling your content so that it continues to bring in engaged visitors.
Affiliates decide within their affiliate programs which banners or ads they're going to place on their websites. This decision is based on their individual calculations of which company ads their website visitors are most likely to be interested in. They will also agree to affiliate programs based on which merchants have the best commission structure, although the structure is not usually considered very high-paying or profitable.