They just arent big enough to payout a huge win. That is the problem with them and many other online casinos, but RTG and Playtech are the 2 big software providers who i believe do not require a huge amount of capital be escrowed by its new licensees. Which is why you see alot of the new casinos are one of these 2.
This is also the reason you DONT see it happen at MG and Crypto sites.
This is also the reason you DONT see it happen at MG and Crypto sites.