I actually really like this concept except for one important detail--the name. "Gilded" sounds elitist. Please don't make people hate me even more than they already will when someone I forgot to add to my VIP list starts getting asked to pay for the privilege of emailing my "gilded" account.

The name here is obv. more important to users than with other apps because it's embedded into the email address. I'd even rather have a nonsensical name than something that makes me sound elitist.