I have been using a upload music to Spotify service named Globex Music for a while now, and honestly I’m pretty happy.
The upload process is simple. Nothing difficult.
Tracks get approved fast. Didn’t really wait long.
I contacted support a few times, and everything was explained.
Withdrawals are easy enough. Pretty standard process.
Working with different types of music. No issues with covers.
Cost is affordable. About $1 per release.
Using it long term, and so far everything is stable.
Kind of underrated service, but works fine.
If you care about referrals, you can join partner program.
So yeah you can try it yourself. Not perfect maybe, but works fine.
In case you’re interested, you can join using my link.