Or it could be luck, given the number of requests that don't get added. I've had some requests added, actually, but I don't pretend that I had a significant effect on HTC's decision.
In fact, especially with these types of planes, I really don't think our threads have much any effect on when they're added. The P-63 is clearly going to be one of the last things added, so right now you're essentially just saying "hey, this thing exists, and we might get it years from now. Just FYI.".