> Category 1: should apply to services which meet either of the following conditions:
> Condition 1 – uses a content recommender system; and has more than 34 million UK users on the user-to-user part of its service, representing around 50% of the UK population;
> Condition 2 – allows users to forward or reshare user-generated content; and uses a content recommender system; and has more than 7 million UK users on the user-to-user part of its service, representing c.10% of the UK population.
https://www.ofcom.org.uk/online-safety/illegal-and-harmful-c...