I've never even considered making any of mine PMO but we have a fairly small Geocommunity up our way. I don't pay the fee to be part of an exclusive club I pay it because for 30 bucks a year lots of people put a great deal of effort in to publish my finds, hides and laments, and it is just a small way to show my appreciation. If I made them PMO there would be less work to do and I would get less gratification in seeing posts.
Seems like your damned if you do or........