I fully agree that in such a situation I would be pissed at such shitty attitude, but not angered nor resented, simply because those are the upfront rules of the game you accept the second you play by the OSS rules. And it's not a bad thing, because if you made your project OSS sharing it with no market scheme behind, then either you're naive (besides being well intentioned), or you just want to see it happen, in which case you should be happy that a company made it a reality without you having to make further efforts. Everyone wins.