Those auto-tourneys occur so frequently that there's already an insane amount of tc being generated from that. Besides, tournaments start when there are 5 people in the queue (I don't think that should change), so sometimes the winner only plays 2 games and comes out with like 1000tc. With a second prize as you're suggesting, you could play 2 games, only win 1 of them and come out with 500tc. There are plenty of GM and community hosted tournaments that offer second place (and sometimes 3rd for hot seats and stuff) I don't think it's necessary to add this to the auto-tourney servers.