And you thought you were done with Party bonuses for the month. Hah.
Code is COMPBONUS, 20% to $100 (deposit $500 for the maximum bonus). 500 raked hands to clear, with 30 days to clear it in.
One word of caution is not everyone is getting this code, so it isn't guaranteed, and it likely won't work for you if you've gotten an IGM bonus in the past or have bitched at them about a previous bonus to the point they comped you a bonus. This isn't a public bonus code per se, and is apparently intended for comp purposes. But it works for most people and is still active as of this morning.