The login requirement was never removed during the maintenance period and does not require that you continue to the cPanel either, having logged into the account panel is enough. We have however halted the AUTOMATIC suspension system during the maintenance.
The maintenance is not fully completed which is why the note about it is still up there, due to unforseen events the new backend could not be deployed as expected but is still a scheduled part of the process.
At one point we did set accounts to unmetered, this is no longer the case, but we do expand the space as needed, as long as the account follows all parts of the ToS and all files are related to the site(s) in the account. During the transfer all accounts was put on the same base plan as we had accumulated a few versions over the years.
Quite honestly, right now you may not be entirely i par with the ToS. The folder /wordpressold/ would seem to me is a backup (that folder hold a large portion of your used disk space), correct me if I'm wrong and tell me where it is linked to from your site(s) so I can verify it is indeed part of the site.
Also this part of the ToS:
By appearance the site appears to be a gallery site, but since the gallery link does not work I can not check if that is a mistaken conclusion.
This means that at this time your account is not in par with the Terms of Service and can therefor not get more disk space for free. You are welcome to do an upgrade to our
premium hosting if you prefer as that does not have such restrictions.