Your giving away the exploit though so it's not really only $1. How much is having it actually worth, probably more then that, probably more than $500 too.
The exploit is supposedly so trivial that everyone needed to take down their services until they could patch? There should be nothing to give away here, which I think is the point. Either it’s trivial and you swipe the $500 or it’s not and you save it (assuming you have it). In the latter case you shouldn’t really be worried, since they won’t burn an exploit on you either.
lol the exploit is patched, why are people acting like it's a a zero-day? anyone you attack with this, in any case, has to be someone who hasn't yet upgraded their PHP version. it's worth nothing to hide/sit on.