nprofile1qy2hwumn8ghj7un9d3shjtnddaehgu3wwp6kyqpq98t8kgwqas59rvmnghzcdn6krzhxhpkyt2mt53e4g9sdnj74sszsv4x759 (nprofile…x759) even if you assume it is a user-to-user service, surely a service can't have a "significant number of UK users" (plural) if it only has one singular user.
(Failing that, you could probably shoehorn it into the "internal business services" exemption given that it defines "business" rather expansively)