It may happen that the 50 top tracks of an artist from last.fm correlates badly to the tracks found locally. That stops us from using the artist in radio functionality.
If the user has many tracks of an artist, an very few are found in top 50, fetch top 100, top 150 etc from last.fm to get better statistics.
(Artist "Den svenska björnstammen" is a good example of weird top tracks, compared to official discography)
It may happen that the 50 top tracks of an artist from last.fm correlates badly to the tracks found locally. That stops us from using the artist in radio functionality.
If the user has many tracks of an artist, an very few are found in top 50, fetch top 100, top 150 etc from last.fm to get better statistics.
(Artist "Den svenska björnstammen" is a good example of weird top tracks, compared to official discography)