Sorry maybe I wasn't clear in my question Actually I don't have a totally free offer but rather a paid offer with a 14 day free trial, And regarding the registrations, I was able to get about 5 registrations but no paying user, I receive them after trying the cold mail,

And most of my visitors come out of the pricing page, I think that the pricing is not suited to my offer but the problem that there are products in market with the same features, more expensive and work well