I'm shocked to see this price. If players can get this t-shirt for free by doing 50k drop with $0.01 ($500 wager) and assuming that the house edge is 1% and with the fact that there is no 0x outcome in plinko, I think spending 10 dollar is enough to wager 500 in plinko.
Yep, that's the point! This is exclusive for anyone who has dropped over 50k balls on plinko - we had about 500 eligible users from the period in question.
Be on the lookout for more merch giveaways like this...