There will be nothing that satisfies the criteria for highly-interactive reflective e-celebrity AI

By "biggest", I mean I will try to get some comparable numbers like Monthly Active Users or similar.

If there is a council or team of AIs/AI personas, then I will try to count them as a single entity, at least if they are run by the same entity. If there are different e-celebrity AIs that develop friendships or alliances, they will be counted as separate. If there are a massive number of different AI personas (e.g. Replika), then they will not count as an e-celebrity at all.