Isn't that obvious why, though? The team isn't selling tickets through there, other brokers and individual fans are. (there are a few exceptions, i guess, but I don't understand why they'd undercut their own box office, and scalping on the high side is kinda messed up) If I sell you a ticket, and you sell that ticket to someone else, how can I count 2 ticket sales? Obviously, I can only count the original sale, only one seat changing hands, just multiple times. otherwise, they end up telling people they sold 60k seats to a game for a stadium that has 40k seats. I sell a lot on stubhub, pretty familiar with the deal there. Mostly, the teams (and MLB) get a cut to advertise stubhub and not fight to shut them down. And MLB helps even more by letting stubhub into their ticketing process to validate barcodes, further legitimizing the stubhub process, they both make more money, etc.