Users saying that can't get through offers?

I have a page content locked on my site with some target traffic. I am getting users messaging me saying that they have completed the offer but it did not unlock the pages? I am seeing views and clicks but not a lot of leads. It is working fine on my end but I'm on a Desktop. This is ig traffic. What could be the problem? Are the users just retarded? I am on CPAGrip

 

Probably your users are willing to get your content without completing anything for free.