At expo Michael contributed to this forum by helping to hand out AP flyers and especially making sure that anyone who purchased a pin on the Sunday got a flyer. He also gave the forum a very good plug during the Saturday night dinner.
Every one is different and has their own reasons for the way they do things; it would be fantastic if Michael posted on the forum given his enormous wealth of knowledge, but maybe he prefers to spend his time doing other things rather than hanging out on a pinball forum (inexplicable I know, but it could be true).
I can see your point about why join if you are not going to get involved, but I can understand not posting as well - I am on a couple of mailing lists which I used to contribute to, but don't any more. I still find it interesting to see what is going on, however, so I remain on them. And if someone was bugging him to join maybe he did so to stop the bugging...
