There are established alternatives.

eTix is good. The quoted price for a show was $20. I wound up paying $21.65 after fees. The fees were obvious at checkout. I didn't have to sign up for anything or download an app, either (which I don't like about Dice, but they are similarly good otherwise).

The problem is mostly vertical integration & abusing a monopoly over venues of a certain size. I understand I live in a place where there are more independent venues than other places and I'm glad I happen to be into the acts that play them...