I mean theres only what?
1500 MCCI players on at any one time so like maybe 20000 players daily at most?
Then consider you need a player to be dedicated enough to make good content
Plays Battle box and not another game like Skybattle or PKW
you get a small number
then they also need to have the confidence to make videos and want to make them
and have some basic equipment to make them
plus alot of players see battle box as "Easy" for some reason so YT's of small size who focus PvP minigmaes usally do so as a way to show some of their skills of if people think bb is easy they would want to play SB instead