Of course they provide liquidity. But the whole point is that the entertainer doesn't want liquidity, they want illiquidity, for two reasons: 1. The marketing

Of course they provide liquidity. But the whole point is that the entertainer doesn't want liquidity, they want illiquidity, for two reasons: 1. The marketing value of a ticket being impossible to obtain. The best way to do this is to sell the ticket below the market clearing price. Then you get rows of people sleeping before the day they go on sale, etc. A lot of people want that image as they believe long term the marketing will generate more revenue. 2. They want fanatical fans rather than rich fans. They may feed off the worship or cheering and want those who go through a lot of hoops to get the tickets, rather than a salesman using the company expense account to wine some client who might not throw their bras on the stage or paint their face green and scream for their team. In this sense, you can think of the money the entertainer gives up by selling below market as the purchase price of audience enthusiasm. Now if the scalper steps in, and instead of having the underwear tosser you get the businessman, then many entertainers/performers would be pretty upset as the scalper took for themselves the enthusiasm payment and left the entertainer with the market-rate fans.