(Original posting edited, as the related website does not exist anymore)
This idea is about using Deezer as the playback source for Last.fm content besides YouTube and Spotify, e.g. playing your favorite Last.fm radio stations like Mix, Library or Recommendations in Deezer with HiFi sound.
Deezer has an API, Last.fm also has one, so theoretically it should be possible. For example Mentor.fm already uses Deezer as playback source for its own radio algorithm.
I am not sure I understand what your suggestion is in this can you explain in more detail? I am curious to hear more !
MusHub is a first step for them, although it does not support Last.fm's personalised radios yet, see https://mushub.net/about for a list of currently supported track lists on Last.fm. A full support probably would have to be realised in a cooperation between Last.fm and Deezer though.
This however might be up to Last.fm rather than Deezer.
As Last.fm has a new support forum now, I also created a related idea there, so you can vote on it if you would also like to listen to Last.fm content in Deezer:
https://support.last.fm/t/deezer-playback/3235
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