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.