If you count out advertising on his trunks an all the little things(that together can come up to good number) I would say on average 6-10 mill euro per fight.
It's more around the 2 - 3 million euro mark. Haye fight was about £10 Million. RTL only pay 1.5 Million Euro per fight... and nobody else really pays top dollar for it...
Bull**** hater, wlad or vitali get 3.5 mil just from rtl for one fight+advertising and different tv rights they get some like all together 10 mil just for wlad or vitali, after the costs. Vitali sosnowski generated 25 mil, vitali got 15 mil after all
RTL is just 1 of the sources of income, their fights get broadcasted to a lot of countries. They might not be big in the US but outside of it they do quite well. Around the 10 mil per fight mark with the Haye fight generating quite a bit more. Add to that they are 2 of the few fighters that can sell out entire soccer stadiums fighting virtual unknowns.
You cant blame Vitali for coming back, easily dominating with wlad, making big money. The guy is basically securing his legacy in boxing as a hof boxer while cashing in big to make a nice retirementfund in only a few years.