Services continue to report a wave of automated account creation using the naming pattern "bp" followed by a series of random alphanumerics, eg "bpc7463204e397374e" or "bpde9af0166700f555".
To date almost all accounts are created using an email address at the domains:
docomo.ne.jp
ezweb.ne.jp
and to a lesser degree:
yahoo.co.jp
au.com
Requiring approval for accounts using these email domains during this attack will severely minimise your spam account review activity.
@iftas blocked some email domains. Thanks for the heads up!