>See also the first snobby, then underhanded, then petulant behavior
This just corporate open source as a whole. I don't know what else he expected. You don't participate in open source with the big boys if you expect a quick response or you expect to get any kind of non-trivial credit for something. It is not you who is paying the bills. No reason to be skeptical about it, this is how the game is played.
