lunabee34

as I know at least one person who had people correctly guess her fic but not send her any feedback on it, which she found profoundly strange

How incredibly tacky.

I've actually been recc'd a couple of times without getting feedback from that author, and it didn't make me feel weird. What I did, like a big attention ho, was treated it as fb and commented with a thanks as these recs happened in a comm post. Twice that I know of I've been recced in someone's personal lj, which I did not respond to, cause that would be weird since that person's not on my flist, but once the person who pointed it out to me was good enough to do so in the comments to the fic itself so I can go back and read it as fb if I want to, too.