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.
mainly US games which has been deteriorating for many years. There were sevral BJ paradises going on for the past few years providing 10s of million $ a years for several hundred counters. I played one which had high tolerance allowing spreading of 1 to 90 and could play ten or 20 hours a day. I counted over 90 counters, mostly full time, in one casino over a weekend this year. The other was a region with many casinos offering full ES shoe games. Both parties are over basically but you never know when next one will pop up and won't find one if you restrict yourself or waiting other people telling you.