CE Profit is Roughly Half of Expected Profit

“ As has been pointed out by MathProf, the CE profit is approximately half of the expected profit.”

Source: https://bj21.com/category/advantage-...valentanalysis

I remember the 2 : 1 ratio because I had asked a similar question to Kim Lee (guy who did the math for Kill Phil series, Optimal Departure for back counters when wonging in blackjack, etc.). Kim was working for a bugle bracket investment firm on Wall Street at the same time I worked on Wall Street.

My question to Kim Lee was: If I got $100 in free play from casino A, how much EV did I need in casino B to be indifferent?

I remembered Kim Lee telling to use 2 : 1 ratio; the actual answer depends but 2 : 1 was a good rule of thumb to use.