Some new stats, about 1500 failed bot signups over the past 3 months,
and a further 600 fake accounts that went through (about 500 got rejected because
they were from Russia / used a Russian email address, etc.).
About 90 fake accounts were registered (accounts that never solve a single puzzle,
only some of them change their country setting).
The bulk of these are from Russia, even though the Russian signup page
has a big sign saying that signups from Russia have been disabled..