Calling The Clock is a rule used to discourage a player from taking an excessive amount of time by giving him/her a set amount of time to make a decision, or risk having his/her hand declared dead.
Winning poker players at low stakes will make between $10 and $20 an hour. Winning poker players at mid stakes will make between $50 and $300 an hour. Winning high stakes poker players will make $500 an hour, $1000 an hour or more.