If a band has to actually RENT a venue, they suck beyond belief, and those aren't the people we are speaking of.
The venues want people to COME to them, and being able to draw them in with a musical act is a way for them to make money. Have you ever gone to a concert where a beer cost $2 (in the last decade, that is, I don't want to assume your age and you tell me "whippersnapper, way back when I got a beer for a quarter and a slice of pizza for a nickel...punk kids"

) or a soda was $1? These venues that get a band there make money hand over fist on the "incidentals" that people buy when coming to see the group. That premise also is expecting people to believe that Billy Joel is PAYING to RENT OUT Madison Square Garden! THAT is simply laughable!
True enough they have to spend money on sound equipment and the stage props. They also had to buy an instrument way back when also. Those are fixed costs. Do you believe that when a gig ends they leave all that stuff at the venue? No. They use it. Again, and again, and again, and again and ag...well, you get the picture. These things simply do not make a big dent in their profits of playing live when averaged out over the life of the product. When you do 300 shows a year and a sound board costs you $10,000 does it not show you you how cheaply these things will, after all is said and done, actually cost them?
The bigger the band gets, the more lavishly they spend on themselves, but the money is either paid by someone else, or if the band has to pay for it, it isn't as nice a product they buy - UNTIL they get large enough where even their swill is filet mignon to us.
It should be readily apparent WHERE bands make money by simply listening to WHO is making the commotion about WHAT issue. The RECORD COMPANIES are the ones at the forefront of the gripefest about music piracy, while by and large, BANDS are at the forefront of the gripefest about VENUE piracy, ala TicketMaster et al.
Do you think you'd hear Eddie Vedder crying and railing against piracy if it affected his paycheck to the extent that TicketMaster did? You bet your sweet @$$ you would!