[imtringued]

If you're Microsoft and you release another Xbox, would you ask Nintendo or Sony to provide the OS for you, or would you use just modify Windows to run on your latest Xbox?

The venue is owned by a company that also owns a ticketing system. Of course they're going to use it.

Ticketmaster gives promoters very liberal API access and has a complex resale and dynamic pricing system that the promoters and artists can utilize. This is where the sketchy things can happen.

The dynamic pricing system (which is optional and enabled by the artist/promoter) is obviously going to perform like an auction system, so the price is going to shoot up for popular artists.

The shadiest part by far is that promoters can enable the secondary market if the artist allows it, then purchase and resell the tickets themselves. This will obviously make them look like scalpers, but there is a difference, the artist usually has a profit share agreement, let's say 80% of the profits after expenses go to the artist and 20% to the promoter. This profit share agreement usually doesn't cover the profit generated by the resale of tickets, so the promoter has a strong incentive to make his money using by "scalping".

If you look at the consumer facing entity "Ticketmaster", you're looking in the wrong place.