Is there any way to multiply the number of paydays received per hour to level up faster? I once saw a guy intercept the request submission and modify it to make the server believe you've been playing for much longer than an hour.
CLEO related
Basically it is impossible. The time issue depends solely on the server itself, you can't cheat the server time, it doesn't work that way..
Probably what you saw is a server that checks according to the amount of "PACKETS" that a player sends, and according to that he makes his PAYDAY (stupid idea and I don't think there is a server that does that at all)
In any case it is impossible (if you have a time machine it can help you but I would use it for better things :X)