Just because something has IAP doesn't make it bad. One has to look at how the app uses IAP instead.
Discoverability is what the person is talking about, and it would indeed improve discoverability.
Keep in mind that via Spotify's subscription model it's only something like 20% of the what users listen to thats chart music. The rest is outside the normal popular genres.
So it's a chicken and an egg discussion.
Thats how the movie industry still works that how the music industry used to work.
I bet you Netflix show the same tendency of having more people see non-chart movies than if they had to pay for it.
Which is why I really wished down votes came with a requirement to quality why you are being down voted.
Here I though I was making an argument that when people where given the freedom to choose without it having financial implications they would in fact choose differently than when they have to pay for it and a "mistake" means more.
It's not Hollywoods fault we got Transformers 3, it's the 50 million people who bought tickets to Transformers 2.