The same actually applies to bookmakers, if you choose a bookmaker that always pays out nicely for years, but then suddenly does not pay out if it concerns a large amount, then you can also have your reservations about that as a player. Trust is important to customers in the gambling world.
And trust isn't something that can be gained or established in a short time and this would include those all factors that we do consider on spotting a good gambling site or bookies.
This do involved all of those qualities that we're seeking off and its true that it would only just be break on a single situation where you haven't paid out winnings.