No, I do not mean "a group of enthusiastic players constantly praising his work".
Like, cult is the word choice used by the person who Lulcielid linked, but eh sure let's roll with it. When I hear "...cult formed around Yoshi-P...", I think of the people who got really attached to Yoshi-P (and Soken and KojiFox and Ishikawa and Foxclon) due to FF14. I was very active in FF14 Twitter/Discords/forums/etc from Heavensward until mid Endwalker, and,
maaaaaaaaaaan. I'm sure that person on Twitter has encountered these people as well.
If you read this and think to yourself something like, "Well I play FF14 and I'm not like that" or "Well I play FF14 and I've never encountered those people before", then that's great and I think you should keep it that way. To be honest, I'm not even sure how you intentionally run into these people, as my run-ins have been me minding my own business and they approach me over something I said/did either in-game or on a Discord.
...maybe it actually IS a cult and they were trying to recruit me?