Maybe you have some nice strategies against boring with little maths.
The best strategy for those type of games is to shop around and find the site that has the lowest house edge. Also, I have heard, there are ways to take advantage of sites that don't utilize sound bankroll management practices --> that's just what I've heard. There are some who understand the Kelly criterium very well who shop around for dice sites to exploit ---> they say it's fairly lucrative, but I wouldn't know first hand.
The dice sites wouldn't go bankrupt,if they find out someone is winning a lot of money they would simply block the accounts and investigate further until the find out how you have cheated.Also the withdrawals above certain amounts are carried out manually.