The hype priced in this match. I wouldn't pay for that amount as this is an obvious match that's just for entertainment. No professional value for me because it's not counted as a professional match, no title but just for the sake of popularity.
Im sure they and promoters make a lot of money on that fight, sure there will be fans who could afford spend 89,99$ on this, but sadly their contribution to boxing is a bit greater than zero.
They've already made a lot of money from it because there's no sits to be counted and they could just let it an unlimited purchase and could make them money as much as they can. I guess both of them already won with that price.