It seems there's part of the budget wasted on playlist that are clearly not fit for the music and that have no relation to the genres selected so its not really on the curators end for not accepting. I've had several reviews mention either an opposite mood or different genre than selected

After trying multiple other playlisting services, Playlist Push has become a stable in our growing indie label's promotional tool belt. We've used it on over a half-dozen campaigns and have received solid results for growing our stream count and monthly listenership on Spotify. With a wide-range of budget options, Playlist Push makes it easy for us to set aside a small or large amount depending on the unique needs of each of our releases. We've also loved building rapport with Daniela from Playlist Push, who recently gave us very useful insights in how to split up the budget of our latest album release campaign and which songs to focus our Push on. We love their system transparency and their monitoring of botted/faulty stream sources. We highly recommend.

The service is easy to use, and it does work in terms of getting exposure for your track. It's a little expensive and the results can vary, but overall a positive experience.