Is it possible that new users will only be shown in the statistics after their first login in forums?


I already use $closeRegister=1 , but in that case a new user is shown directly after their registration.

Unfortunatelly, that's not possible with non-destructive or easy solution. First of all, miniBB doesn't fix "first login" of user anywere in database. It's needed to create additional field, than break some core scripts for handling it.

If you want to avoid automatic registrations (and not show profiles with some kind of "spam" links etc.), we recommend to get Captcha addon.