A little info from the Site Introduction:
"The first thing to know is that Red Hot Pawn is first and foremost a correspondence chess site. This means that when you make a move in a game, it is unlikely that your opponent will reply to your move immediately. Typically, you will make a move and then wait minutes, hours, or, depending on your opponent, sometimes even days for your next move.
When your opponent does move, you will be notified by email, or, if you choose not to receive email notifications, you will see a list of games awaiting your move each time you visit Red Hot Pawn
Isn't that a very slow way to play?
Whilst real-time chess is suited to fast, blitz games, Red Hot Pawn allows you to make moves when you are ready; games don't have to be finished in one sitting. It is for players who would rather have several games running concurrently and dip in and out of the site throughout the day."