Made the program. I want to sell it. The license mechanism for registration keys, which are limited in number, and they are all generated in different ways. Activation takes place via the Internet.
The question remains - how to organize the sale on your site, or through third-party services.
I somehow don’t want to deal with WM certificates (I would like if I lived much closer to their institutions)
In general - share your experiences, gentlemen. Or give links, because Google has not given it to me yet.