[LarzI]

Globally:

pawn Код:

new gOnlineTimer[ MAX_PLAYERS ];
//making a global variable to use later when killing the looping timer

OnPlayerConnect:

pawn Код:

gOnlineTimer[ playerid ] = SetTimerEx( "HourScoreIncome", 60*60*1000, true, "i", playerid );
//here we initialize the timer, and assigns the global variable as its ID. The timer will loop every 60*60*1000th millisecond, which is every hour.

OnPlayerDisconnect:

pawn Код:

KillTimer( gOnlineTimer[ playerid ] );
//killing the timer so that it won't run when the player disconnects

Anywhere:

pawn Код:

forward HourScoreIncome(playerid);
public HourScoreIncom(playerid)
    return SetPlayerScore( playerid, GetPlayerScore( playerid ) + 1 );
//simply adding 1 to the player's current score (the timer function)

This should work.