I went to a very well-known university (in the US), and they had business courses that literally invited speakers in that had startups that were ticket arbitrage.
I was taken aback that they would be bragging about buying out all the tickets for an event and then charging more for them. Their response is something along the lines of "well first we are getting the 'real WTP' price from the consumer and second we sometimes buyout events that turn out bad and lose money, so it's fair!"
But the whole time it was discussed by professors as if this was a great idea!