Fans who really want to see their favorite artist/sports teams get extorted, and the money goes to scalpers instead of the artists and venues which are actually providing value. Scalpers provide no value to society.
Planet Money has done an excellent episode on this - https://www.npr.org/sections/money/2013/06/25/195641030/epis.... While I broadly agree with this, I would say that scalpers can actually provide a service of exchanging money for time and convenience. For example, you may have a free or cheap concert that sells out extremely quickly, but with scalpers, those with lots of money can always get a ticket. Much of the economy is built on the similar concept of arbitrage, where someone buys something cheaply and sells it for a markup to those who lack the ability or knowledge to get it from the seller's source.
That said, scalpers in particular seem to cause a whole lot more harm than good in general. As the above podcast addresses, it's a very difficult problem to solve systemically if you are intentionally undervaluing your goods.
> For example, you may have a free or cheap concert that sells out extremely quickly, but with scalpers, those with lots of money can always get a ticket.
But how do you square that with scalpers causing the tickets to sell out so quickly? I mean, they're the ones creating their own market. They're not really providing a service if they're the ones creating the annoying need for the service in the first place.
That said, scalpers in particular seem to cause a whole lot more harm than good in general. As the above podcast addresses, it's a very difficult problem to solve systemically if you are intentionally undervaluing your goods.