This is a sample BRIBE_PROG:
1) Type: BRIBE_PROG
2) Args:  5000
3) Commands

BRIBE_PROG checks if another person or another creature (not
the mob), gives 5000 or greater number of coins.  If the mob
receives that many coins or more, it will execute the commands.

If you don't know what args is, help ARGS.
The args in this example, determines the number of coins needed
to execute the trigger.  If no ARGS is specified, then the
default is 1.
So if args is 500, and if a creature/person gives that mob
500 or more coins, then the trigger is executed.