It's very likely you only start getting 'requests' from 3-letter agencies asking you to scan content once you reach some large mass of hosted content, especiall

It's very likely you only start getting 'requests' from 3-letter agencies asking you to scan content once you reach some large mass of hosted content, especially since the technology for even doing so is locked up, with NCMEC and Microsoft being the arbitrators for who gets to use it: https://www.microsoft.com/en-us/PhotoDNA/CloudService https://www.microsoft.com/en-us/PhotoDNA/CloudService