Dont Think so and if there is any it might just be a Scam, you Can always gamble with IRL cash just small amounts or larger if your Rich xD
If you know alot about the teams and how the chance of winning is you Can make a decent amount of money since most betting sites doesnt change there bets after picks has been made
I started with 40 euros last TI and turned it into 450 after TI was done and i even lost 100-150 euros on matches i was not 100% sure about so play it safe