I meant it in the sense that it's not happening. But that if it happened, I'd be more worried. I think it would also fail.
The mere act of taking money, and Amazon presumably pays them a lot, is not immoral.
It only starts to be a problem if larger percentages of the teams work at Amazon, and people would be put onto teams just for being employed at Amazon. Linus Torvalds has made it clear that he doesn't make people maintainers for some component just for being employed somewhere. Instead of being bound to a company, maintainership is bound to the person. I think this is a good policy and one that Rust should keep.