Comment Just not careful ... etc... use data and analysis (Score 1) 320
OK, point looks to already have been made (-1, redundant?)
They weren't careful. A careful strategy, would not raise alarms by taking extraordinarily high wins, and would accept reasonable losses, ie, not fold with a great hand *even if* you know you'll loose.
What you'd want, is to scrape in marginally better positive wins, not great hits, -- and then move on. Heck, just in case, take some more-than-usual losses at some casinos. Build a data model; speadsheet it; look for a reasonably higher ROI, say 50%/annum on the operation, not spectacular wins.