They are giving a sweeter deal to the 2nd stage bands. Ozzfest charges them 75k to go on that tour. Mayhemfest doesn't charge them, but actually PAYS them.
any idea how much? do they cover their travel expenses and pay per diems? or insurance?
I know I've ranted about this before but that $75K is an investment to keep out the boogers. it's like a security deposit on your apartment except you get it back from the fans. it insures that you are not booking a bunch of idiots who aren't ready for the big time. and if they come off that tour turning on new fans who buy their shit and come back for more they have done their job.
back when I helped my friends' bands get gigs years ago, to insure that the bar wasn't going to be empty for a unknown new band, the booking agent made us buy $500 worth of tickets and do whatever we wanted to do to get our asshole friends to show up. we could give them away (we used to run contests with our local metal station), sell them for whatever we could get for them and that's what we got paid. after we packed the place
they got paid very nicely after that with regular gigs.
if you didn't learn the very valuable marketing lesson from that experience, stay out of the music business.