Hi Piotr,
It's always a pleasure to read your nice comments ;-).
Clickbank is a website (https://www.clickbank.com/) that is like the magic place for affiliate marketers. It is a marketplace for affiliate offers and products. You can find about anything to promote and sell. There are however also negative aspects like a couple of years ago, they still paid you with checks by post...
About Holybread I quite agree with you. On the other hand I also understand their policies. The problem is that on the steem blockchain it is quite easy to make fake accounts and to cheat referral commissions if it is not on sales. However I think it would have been nice if the commissions were paid at least in steem rather than in bread.
There are many website that have affiliate programs that pay according to the activity of the users. Typical websites are trading platforms like binance or websites where you can earn coins like cointiply or faucets.
The idea is that the website owner delegates his marketing to its users and when you get new users, you earn a percentage of their earnings. Lets say my referral earns 100 satoshis with cointiply, I will recieve 25 satoshis as referral commission. My commission will be paid by the website owner.
Hope this was clear ;-)
Best regards,
Achim