There is a legal difference between ticket arbitrage (non regulated, no conyract between the venue and the company doing the arbitrage, in which case it would be a wholesale business and the venue wouodbhave absay in prices, also sometimes illegal) and speculatiob on things like food (regulated futures at official markets following complex sets of rules and contracts between parties). Sure, the latter is morally bad (as implemented, as intended there are some benefits), the former is pure abuse from parties with the means and resources to abuse market mechanisms. In a way, ticket arbitrage is the worst consequence of Dropshipping, and yeah, in a sense it is what unconstraint capitalism gives us. Also, it is illegal in certain countries.