You can add whatever you want in your license and none of it matters unless you are prepared to go to court. Even then, you might have a hard time getting the company to respond if they aren’t based in the same country as you.

For example, Onyx is a Chinese company that makes a line of e-ink tablets (Boox) that are based on open source software. AFAIK, they have refused to honor the terms of the GPL and release their modifications.

> You can add whatever you want in your license and none of it matters unless you are prepared to go to court. Even then, you might have a hard time getting the company to respond if they aren’t based in the same country as you.

It still matters for all practical purposes, IMHO. "Willfully violating terms of a license" results in very very different reputation for the brand than "Adhering to the terms of the license".

In practice, Amazon isn't going to take your "free for non-commercial use" software and try to sell it back to you even though they know you won't sue them!

Sure, some companies will do that, but lets be honest, if they are prepared to violate the license for FLOSS products, they'll violate it even if you didn't release it as open-source.

IOW, pirates gonna pirate; the license terms are irrelevant because they are pirates.

I think the main discussion here is big SaaS companies using peoples' FOSS without giving anything back, either feature or cost-wise. No solution is perfect, but at least this would give you the ability to push back on a company that is trying to "sell your own product" back to you.