Contributing to FOSS projects because it helps their bottom line is the reason everybody does it. It's a good reason to do it. That's not the problem.

The problem is when you try to establish barriers to the customer ever switching to a competitor. Microsoft isn't the only company that does that but they are obviously a company that always has and still does do that.

Every single FAANG does it, but for some strange reason the HQ address changes the point of view on them.