There are 5,000 casinos in the world
Casinos can't bar all players spreading. You can survive most by hit and run. Here were three of my teammates results this year, counting only against $100,000 bankroll playing with 1 kelly risk:
Counter 1... US... US$110,000... about 50 days' play.
Counter 2... non-US... US$204,000 playing 420 hours in 39 days from one casino, barred after 39 days.
Counter 3... non-US... US$48,700 playing 412 hours in 43 days, from the same casino as counter 2, barred eventually.
Besides counting, there are other advantage plays such as hold carding, shuffle tracking etc. which have higher profit potential and longer playing life.