Where are you seeing how much you were credited? I can't find anything that tells me such.
You have to go to "accounts," "activity," and then look for entries stating "Collection agency fee adjustment" and "Interest adjustment." (Prosper never makes it easy or transparent, notwithstanding their blog bloviating.
I got $0.49 -- Whooee!
I also never received the initial e-mail that other people seemed to be getting saying that they would be crediting soon.
I have more than one loan that was originally with Penncro (never went to Penncro), went late and was sent to AmSher, and AmSher has been charging me full 17% fees. I am wondering if PMI has messed up in how they determined who and how much to credit.
WHAT? You think Prosper may have messed something up? How could you even entertain any such idea?

I can't recall now, but I think Prosper may have limited their refund promise to loans that were already at Penncro and then moved to AmSher. Of course, one might reasonably ask what gave Prosper the authority to reassign even loans that weren't yet late, but which the bidders had chosen Penncro, from Penncro to a higher priced CA.
Please check your activity page to see if you did or didn't get the refund. Enquiring minds want to know if Prosper left a big group of aggrieved lenders out of the refund.

ETA: I also have FirstSource selected as my collection agency of choice, not AmSher.
That shouldn't matter -- I did too.