@gr36 We still don’t have an official policy on reclaiming old unused accounts. But we have been working on deleting spammy accounts, so I’d like to also address unused accounts later.

@manton @gr36 Some providers (libsyn comes to mind, with paid-only podcast hosting accounts) work with slugs, which must be chosen at signup. They are as unique as e-mail adresses, and, therefore bound to them. The slug is used as a subdomain when no domain name redirect is set for the blog.