Compared to EV in Comp Leagues, it's a 2.1 tix increase at 40% win rate, 0.5 tix increase at 50%, 2 tix decrease at 60%, and 5 tix decrease at 70%.
(assuming static chest price)
Specifics in next tweet.
For someone with a 70% win rate to maintain EV, chest price would have to jump to ~3.5 tix, which is not likely.
"The house always wins" is based on the 50% player losing money. MTGO just flipped that, so that the average player is up.