Any ball park idea what UFC gives the fighters from total gross earnings
Hockey has a 50/50 on HRR but me thinks the payout is stupid low
About 16-19%
Depending on which source you believe, something like 40% of the UFC roster makes more than 100K USD a year direct from the UFC (including direct sponsorship from Reebok, and fight bonuses). A lot of them are on 30/30 - 50/50 type deals (30 to show, 30 to win) and fight twice a year. Be on a 30/30 and go 1-1 in your 2 fights for the year, and you made 90K + Reebok sponsorship (which is dick for lesser known fighters)
Now, they're allowed to sign sponsorship deals outside of their main UFC revenue stream, but without being able to display sponsors during any UFC events, it heavily cuts into the visibility the sponsors receive from sponsoring fighters and thus, what they're willing to pay.
Sponsorship used to be an easy ~100K+ a fight for well-known guys (Schaub was never more than a gatekeeper for example, and has said that he used to be 100K or more a fight) and according to Myles Jury is closer to 10-20K a fight now (not including Reebok cake which tops out at 35-40K for champions I think) for most fighters. Champions and well known contenders can have multiple sponsors that pay monthly apparently, and the going rate for a guy like Wonderboy for example is 5-10K a month for him to rep your clothing brand, supplements, etc, etc.
Overall the UFC is about a half of a step up from the NCAA on the exploit-o-metre imo. You're an "independent contractor" when it's convenient to the UFC, but you either sign multi fight deals that includes likeness rights, forced into their sponsorship programs (gotta wear Reebok kit, can't bring non UFC sponsor flags to the octagon, etc) or fuck off and go fight for Belator, One, etc.
It's going to take seeing a generation or three of broken bodies and CTE retire from the sport with next to nothing for the fighters to stop with the crabs in a barrel shit and make the Tomato pay what he should be paying.