Would you join a program when it is free and without obligation to purchase any products?

That really depends on whether the program is in line with my goals and visions for the future. If it is, yes. If it is not, no.

Fanie, haven't you heard about affiliate programs? They are FREE to join and you don't have to pay a single penny to join them. The money comes from sales generated by the affiliates when they promote the various products. As an affiliate you earn a percentage of every sale you generate. There are also some CPA networks that pay you for every lead you generate for them.

I like Free programs, but most of them require payment afterwards, because where must the money come from?

Most affiliate programs are ALREADY free to join without any obligation to purchase any product. You get paid your commissions only when you make sales. Aren't you aware of this fact?

absolutely not, you are free zto read 4 free but joining 4 free? 4 what?

It depends if I like it or not, the free and without obligation is not the reason for joining for me ;)