They were doing it well before Tencent bought them out and if GGG is to be believed (they are pretty truthful I would say) Tencent really doesn't interfere with them at all.
Lil'sis mentioned the character she wants to ticket is UR. GBF rarities only go up to SSR (well, unless the upcoming 6* Eternals get a corresponding rarity increase, but they're not gacha characters anyway).