Archived accounts are not eligible for transfer because the transfer script requires an actual cPanel account to import. It can't import an archive (cpmove file).
I'll pass this to Krydos since I'm not sure exactly how this is being handled, but I would imagine the solution will be an invite once we open registration and start creating new accounts.
One point about that: If you use plain FTP, it must actually be plain FTP (the important one is "no encryption" as moneybrz shows in his picture).
If you use the "quick connect" or similar in Filezilla instead of adding the site and setting it up completely, it will default to FTP over explicit TLS, which is not supported.
Yeah...that's not surprising.
HelioHost does not tolerate phishing activity of any type, whether it be phishing websites, emails, or the sale or distribution of software for phishing. Can you explain what you were planning to do with it?