If all of his bets we're at least $100 it's sill easy for him to take the top 1 spot as long as he have enough bankroll and with autobet it would probably take several minutes since the bet speed is 1 per second. I wouldn't say wagering 14 bitcoins is a lot unless he went big and sniped yoloer on the last few minutes of the contest. There's a few ways to do it without spending more than the guaranteed prizes but with the screenshot it seems he wagered more than 10+btc in less than 4 hours which is quite fast..