Probably Predatory – Barely Legally
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barelylegally.com
Except that with software, such a hit-based model is even more skewed towards winner-takes-all than music is. So let's put the blame where the blame belongs: the ones creating the incentive structure, not the ones doing their best within that structure.
Whereas if I have one hit song, chances are I'll buy another one, there really isn't any disincentive.
Or put another way: count the number of apps (you use) vs. the number of songs you listen to.