Originally posted by KazetNagorra
I think it's indicative of the state of radio in N. America. Corporations went on a big buying spree toward the end of the 90's and bought up most of the independant stations. The independants used to play good music regardless of genre/record label in order to draw listeners so that the station could charge advertisers for commercials.
Now though, since radio stations are just part of the larger music delivery system whereby the label/station/music store are all owned by the same company, the large corporation views their radio stations as tools to get bands on their labels exposure to drive sales.
So, now we see radio stations playing top 40 songs 7,8,9 times a day instead of the 1 or 2 when the station was independant.
The list, I think, reflects this contraction of the music industry's exposure to radio.