Thousands (I ended up about 7k up). For the record, I don't often max bet - I have my limits But as I said, when I test, I test playing with big bets (£10+) as I want to test a casino properly, not just with a cursory in-and-out. And this thread proves why. I find the bigger you can afford to play, the more you learn about how they run their business. I know how to manage my budgets and although I am playing to get a big win to test the cash-out process and how they treat bigger bettors, it's important to remember I don't aim to finish "up" (sometimes I do win, but mostly I don't, obviously). Going in with that attitude means it doesn't get emotional, which is where big losses tend to come in.
3,750,000 x linebet. But the odds of hitting it are 1 in 430,208,500,811 spins (that's 1 in 430 BILLION spins!!). It does expose a casino to risk but you should remember that a casino will insure itself against something like that happening anyway, so it shouldn't matter.
Believe it or not but members look upon you as a steadying course, one whiff of the fact that you maybe lose is a shock, horror moment