Just my opinion, but social media is a nightmare of cross-linking, friend suggestions and unwanted recommendations. There would be a real risk of linking an SP's private accounts to their work profiles. Some escorts hate UKP enough as it is, without us giving them unnecessary reason to do so. Ultimately, both parties are in the same boat as to managing discretion.
In a worst case scenario, they could take revenge by outing the punter they thought was responsible (even if it wasn't them) and anarchy would result.