Playlist submission: Free or Amplify only?

I saw that it is possible to request iMusician Playlists for free even if you are not an artist on iMusician. I did that, but no response. (note, I already have tracks distributed by iMusician) I submitted both my tracks from iMusician and from another previous distributor. I ask, does it work? Is it possible? Or else Amplify+?
What the Link says is that it is possible to submit it for free:

Another question: if I upgrade to Amplify+ at this point, is it possible to submit the tracks I already have to Editorial playlists? Or Editorial playlists is only for new releases?

Hello @beto6773,

that’s correct. Once a release is online, it won’t be possible to pitch for Spotify editorial playlists.

@Maurizio , I think @beto6773 was talking about our (iMusician) playlists?

Is that correct?

Yes, I’ve never got a response from the iMusician, playlists’ curators, so I asked to understand better: does it work, are them active, is there difference or advantage being Aplify(+) in relation to Playlists…