The Pro Argument

[meow_meow]

Almost nobody plays that much.
You vastly overestimate the skill differential relative to variance in the short term.

I get what you are saying though.

On the whole, I think people are looking at this argument from the bottom line (long term profit of the site) when they should be looking at the top line (site revenue).

Site revenue is solely a function of the amount of play. In those terms, a semi-pro player who plays 3 hours x 4 tables x 5 days a week, year round is worth 100-200x as much compared to a 'deposit once, play a single table for a couple of hours a day, quit after a month' sort of player.