$20k or something online tourney
potentially one for EU, one for NA
while it's not the premium lan you'd expect off dota/cs an online tourney relieves them of all the major costs/headaches of lans. $20k is simultaneously nothing compared to what valve makes and i'd wager could probably come from tf2's earnings itself without requiring other investments while also being the biggest prize pool in the game's history.
official endorsement/investment of community 6s by valve would make many more players interested in high level comp