I think that they have always made random inpections of PfCO holders records (it's in the permission that they have the right to inspect your records etc.). Perhaps it's just a polite reminder!
I do wonder though whether they are able to make independent inspections of RPQ-s holders (i.e. Remote Pilots)?
I'm curious because they inform you in the newsletter (to which I guess you refer) that flight logs may be checked. I think that the flight logs are the responsibility of the Remote Pilot, not necesarily the same person or organisation as the PfCO holder.