i think confusion comes from that it was never disclosed that microsoft was one who paid prize pool like in other tournaments like KOTD4 it's clearly disclosed. We only knew Microsoft was part of it as of logo in videos. Similarly it seems in aoe4 Genesis 20k is sponsored by microsoft even though Microsoft isn't mentioned anywhereIt clearly also says Worlds Edge/MS.
RB obviously spent far more than $216k over all of the events, but on stuff that isnt directly the prizepool.