I like how you have added that the winner of group games get 50 T$. Groups take up the most time and attention on probably anything on tengaged but until now their was no reward.
But let's look at the people who do the most work on group games, THE HOSTS! Hosting is a tough job and is not very rewarding in and of itself. I think that hosts should get a T$ reward as well as the players.
You could give T$ (like 20) to a couple hosts a month who host excellent group games and deserve a reward.