Of course, data confidentiality should come first for any company. But what do we see in reality? Mobile operators sell databases, sometimes it seems that even banks spread information about the contact information of their users. If Facebook adapts cryptocurrency payments, it will only help its rating. There previously were much info that Facebook confidentiality = zero, everyone can buy user's password, what r we gonna see if they launch crypto payment?
I'm not sure how that would be any different from what we see today. It seems data sharing is a new norm for businesses these days. People who will pay through crypto for customers' data are the same people who are paying through other means today. It could be a hit or a miss given their reputation is not what it used to be in the past.