I think it's fair to recognize that giving gifts, especially repeatedly over a long time, can create an obligation as people become dependent on those gifts and

I think it's fair to recognize that giving gifts, especially repeatedly over a long time, can create an obligation as people become dependent on those gifts and alternatives they might have relied on otherwise disappear or never materialize in the first place. And that's before going into the effort of other people that goes into making an open source project successful but who don't have any legal ownership over the source code and thus no legal say in the future of it.