Sometimes OP will be so desperate (or so unfamiliar with the site) that s/he offers money (or at least says s/he does) in order to get an answer.
The one time I've seen someone act on it (not because it doesn't happen, probably, but because I don't stick around the post) was when the whole sentence regarding the monetary bounty was deleted.
I think outright deletion of an entire paragraph of a post (as was the case in the example above) is a drastic measure that we should agree is good practice before implementing.
Whenever I've encountered such a situation, I've flagged for moderator attention, but is this the way to go? Do the mods value such flags? Indeed, is there even anything against offering money written into the site policy (if not, I think there should be)?