[jhbadger]

Isn't that basically what many authors do? Many authors are afraid of diluting their brand so when they write books in a different genre or style they create a new pen name to keep the works distinct from their main name. For example Stephen King used to write additional books under the name of Richard Bachman, before that identity was linked to him, and the late Samuel Youd used to write under a half-dozen names, most famously as John Christopher (of Tripods and No Blade of Grass fame).

https://en.wikipedia.org/wiki/Richard_Bachman https://en.wikipedia.org/wiki/John_Christopher

[Beldin]

Sure, but the extent differs greatly. Imagine someone doing this to enter an additional genre unburdened by their well-known works - so not "quit the band, band reformed under new name" stuff. In how many genres can a very prolific and competent artist deliver quality works concurrently? 10? 20?

How many profitable genres are there even on Spotify? 100? 200? Where is the line between "revenue-generating label" and "relegated-to-obscurity-by-your-own-choice label"?

I believe an artist can believably perform decently in several genres, but not in hundreds of genres. Moreover, I can understand being cautious when entering a radically new main genre from your usual fare, but I think there are plenty of adjacent genres where there is no significant taint (eg, sword&sorcery / high fantasy / urban fantasy).

As such, to me, there's a crossover point/zone somewhere beyond "several" and before "hundreds" where you're no longer doing it for separating your output along clearly distinct categories where such separation is expected/needed/warranted, but faking an abundance of choice to increase profit.

To me, 650 pseudonyms falls into the latter category - as another comment put it: SEO'ing Spotify to maximise profits. I dislike that, because it has nothing to do with competing on artistic merit.