That's a 0 house edge game, right?
Why would anyone consider investing into something that gives you an expected profit of nada?
Maybe the idea of unbounded risk for 0 EV is appealing? AKA you're a gambler, and this is a cost-effective way to gamble? No idea

PevPot had 0EV gambling (actually positive EV) and was theoretically a sustainable business because it had no house risk (it was totally pvp) and the extra EV was from advertisers buying ads on the site). I guess that *might* work, but gamblers don't seem to care that much, they just want a good gambling experience.
Anyway, investing money in bitcoinbetting.website sounds like a horrible idea, even if you were doing it for gambling purposes. The whole point of investors is that you can offer bigger max wins, but as soon as bitcoinbetting.website max-win is > ~13 BTC, now miners can actually start to cheat on the website, and undetectably rip you off. The only thing that makes the site reasonably secure, is the prizes are small