There is a trend with artists now starting to release on a track by track basis with record labels – instead of being signed and then getting fixed to release a set amount of albums on a specific record label before being allowed to move on.
Why do artists release on multiple labels on a track by track basis?
Releasing on multiple labels (even in the same genre) provides artists with an opportunity to reach fans that might be either following the label or other specific artists on that label. This provide a much broader reach for the artists and if they are able to do this multiple times each month or year then they can quick reach a very large audience for a very small amount of tracks.
Labels are all different and have different strategies on how to reach new fans and their audience and with a bit of luck they will also be promoting an artists track to a much wider audience because they take a larger slice of the releases royalties.