Perhaps it's not completely implemented everywhere. You can go to r/BoostforReddit if you want to read more about it. Idk and honestly idc either, the whole thing is kind of a shitshow. When Boost stops working without patching I'm out of the reddit ecosystem for good.
Can say the same for Marvel Contest of Champions. Never spent money but oh boy did I waste precious time playing that for several years and it was, if I'm being honest, rarely enjoyable. Most of the time it was just compulsive.
Reddit didn't keep their deadline for the API implementation. I've still got Boost installed and it's still working, nsfw posts however went away yesterday. You can still get nsfw if you use revanced apparently but I'm just checking reddit now out of curiosity.