Seemed interesting enough to split off onto its own thread.
According to the site I listen to 100% male artists. I’m not sure how far back into their records they are going but I imagine most of what I listen to these days is made by dull boys. And the way I used Spotify might, I suppose, mean that I only listen to female artists on Bandcamp/Bought MP3s except that I distinctly remember listening to the The Weather Station’s album a number of times near the end of last year before I decided to buy it.
In recent weeks I’ve only used Spotify to play my Discover Weekly or Daily Mix playlists so that implies that really Spotify should be doing more 
Anyway 100% male frankly makes me massively distrust their data.
When you add into that this is their suggested playlist which appears to take zero account of any of the music genre choices I make it’s a rum old world:
