They consider that the cost of a marketplace exceeds its benefits, as you can see in this post.
This is like a party where there is a good atmosphere and a good place, but they don’t serve drinks. From far away they see that people keep coming in, that the first time djs still want to play here, but they are not inside to get thirsty or to listen to all the times the djs have stopped the song you were going to dance, or finding out that that dj you liked was now a resident at another party. They simply have they private party, and there’s no choice but to have yours if you want to serve drinks. Yes, the party of the moment would be cooler with active top djs, but there is little you can do after so many complaints about lack of drink. They don’t want to serve drinks, they think that it is enough with the good atmosphere and the good place, they don’t need the best djs nor the best music for the public party, they prefer a party without any drunks to an epic party.