Man a lot of the formerly key people in that scene proclaimed it dead a long time ago so its hard to really know now
Its weird because they created it and then it kinda just got taken out of their hands once people saw how marketable it could be. Then out of nowhere a whole bunch of 12 year olds just started listening to that stuff all at once. I think the age thing is really key because these young kids don't care about originality and all that ****.
Its also why you see a lot of these dudes with animated/cartoon videos covers etc.
Like take this Comethazine dude, he signed to Todd Moscowitz new label Alamo (he left 300 and started signing a BUNCH of these _'s) and he another clone blowing up.
Might be the first time I've heard a rapper admit in a song that he's biting another rapper (Madeintyo) and theres nothing you can do about it
Another key element prolonging it is theres a lot of different scenes in the soundcloud **** for them to exploit. You got the suburban fashion trapper wave like Carti, Smokepurrp, Pump, Yung Bans, etc. You got the Emo/Depressed wave like XXX, Peep, Juice Wrld, etc. and then you got a whole another wave of dudes rapping fast like Bone Thugs and ****