My guess is Thomas is a big Bitcoin holder and since Bitcoin has risen in price so much since 2011 his get rich iXcoin scheme is no longer important to him.  That would explain why he's only on the iXcoin forum once every few months.  He has no reason to dump iXcoin because he doesn't need the money and wouldn't get much for it anyway.  He keeps paying out bounties because he's following his original plan, just not so aggressively.  That's my take on why he behaves as he does.