That could work if the cost per sale were sufficiently low. But unless companies set up some sort of low-overhead system for putting that kind of money into ope

That could work if the cost per sale were sufficiently low. But unless companies set up some sort of low-overhead system for putting that kind of money into open-source projects, I can't see it working. From what I hear, most devs can't just say, "We use project X a lot, so I'm going to fill out their web form right now and expense a $1k annual donation."