It's possible to implement some down-vote feature, if you see a profile that doesn't match expectations. A user with many down-votes can be banned and alll payments will be returned.

What if they connect the amount paid to the years of experience? For example, you pay less to view a student's profile and more for a top professional.

What if they make some basic info visible? E.g. role, company, and university. Similar to those headlines.