bet365 have a category system based on your win rate, and the more successfull you are the higher category bracket you are placed in and the less you can "max bet" per game or betslip, til eventually they can boot you out just like any bookie if they feel you are winning too much.
also, bet365 are very very good for english, i admit, cos i am from ondon adn they offer imo probably one of the most diverse set of betting options in comparison to many other bookies out there, but they are very fast withtheir odds adjustment, very fast, especially the lower english games !