This add-on allows you to verify the XenForo License validation token of your visitors either during registration or after.
There are options to require a valid license to register (and this works even when registering via a connected account), as well as requiring a unique license or customer.
From (simple) multiple accounts detection to isp/connection fingerprinting with score-based moderating/rejecting logic. These are very effective low-hanging fruit at reducing spam.
Supports migration configuration from the following XF1 add-ons;
TPU Spam Detect
Alter ego Detector
See the FAQ...