Ticket scalpers (or "brokers" as they like to be called) buy up the majority of concert tickets, leaving many die hard fans to turn to other venues to buy their tix.  Madonna is the first artist to make a deal with StubHub, which is owned by eBay and lets people legally resell their concert tickets.  She will get a base fee plus a cut of all the ticket sales.  Yeah, she really loves her fans.....as long as she's bleeding their pockets dry.  I hate her.