That person has already replied with more info on his case, but you should also note that for some people $20k is big enough to never risk that mistake again, while for others it really isn't. I spend around that much each month on Facebook and that's a "well we'll put a little into FB" amount in the scheme of things. Sure, I've had other clients for whom a badly spent $1k was a problem, too. My point is to not jump to assumptions that an adspend is big because it sounds big to you.
(He'll, just this morning I sent a mail to a video website saying that a $15k spend delivered shit results and that we should try again.)