Canelo $365 from Dazn, that's not including the millions he's earned prior.
GGG $100m from Dazn not including the millions he's earned prior.
Anthony Joshua probably already over the $100m and about to earn $32 for his next fight, his endorsements alone are worth millions.
So many not so well known boxers earn far more than their counterparts in the UFC, It'll be hilarious once Dana is paying the boxers he signs more then his UFC fighters who are already established and fan favourites.
Make a note that from all the above figures a UFC like company didn't come along and take a giant chunk like what happened to Conor's Mayweather money.
Conor made most of his money in the combat sports world from boxing. The lesson here is children, if you aren't good enough with your hands go the MMA route to then complain about the piss poor money you earn whilst having to learn multiple arts.