[Albert Moulton]

Ideally, you would want to look at the average hourly winrate for playing poker from all of the coach's students before and after their coaching sessions.

Then the coach with the highest level of improvement in winrates for their students should be the highest paid. And the amount of their payment would be in relation to the level and amount of the games in which their students are doing better.

If the coach doesn't play regularly (for whatever reason), but his students do much better than those of other coaches, then the fact that the coach doesn't play would be irrelevant.

It might do well for coaches to list before and after win rates (or hourly rates for live play) for their students. To avoid fraudulent advertising, online players could check databases to confirm or deny those students' win rates.