Is there a minimum number of website visitors required to sign up for RB2B?
There is no minimum visitor count requirement to use RB2B. Bear in mind that RB2B can identify about 40–45% of your US-based traffic on average. If you don't have a lot of traffic from the United States, you shouldn't expect to see high volumes of identified visitors.
Does the free version produce less or different leads than the paid version?
No, there is no difference in the quality or frequency of leads between the free and paid versions of RB2B. Both versions identify the same visitors at the same rate. The main differences between free and paid lie in additional features — integrations, advanced filtering, and access to business email addresses — which are available on paid plans.