IIRC, a few years ago, SFC (Sci-Fi Channel) took over airing the Fox sci-fi show "Sliders" that had been on Fox for 3 years. During SFC's 2nd original season (season 5), they lost the star of the series and replaced him with another actor - causing them to believe that ratings would go down, so they cancelled the show and invested the money that would have gone into Slider's 6th season towards an untested, muppet-based sci-fi series "Farscape". Farscape picked up viewers fairly quickly after it premiered but to SFC's shock, Sliders had actually GAINED viewers rather than losing them. Faithful viewers gave SFC an earful about their show being cancelled for - as I once heard it described - "this muppety crap", but Farscape had already been signed to a full season and ratings were doing well for it. SFC said Sliders might have a possible 6th season a year later if they can scrape up money, but that never happened.
Not long after this, less than a year and a half, SFC had a management change - USA still owned 'em, but they brought in new folks to run the channel differently. At first, this new management promised to be more understanding of the audiences' needs and nurturing of developing shows; they even produced several popular new series while signing current SFC shows Lexx and Farscape to more years beyond the following season. However, when one of the SFC original shows was in threat of being cancelled (I think it was Lexx or Invisible Man), news surfaced that SFC's parent company USA Networks wanted to throw out the entire sci-fi theme of the channel and use the existing channel to make "The Action Network", basically recycling USA's action film library and creating a handful of cheap, original, expendable action shows. SFC assured everybody that this was not the case... Then the cancelled Lexx after even paying for part of another season they were contractually obligated to; they followed this by cancelling series after series until the only SFC original show left was Farscape.
Farscape has some great action, but is most definitely more sci-fi than anything else. This obviously wouldn't fit in with the Action Network concept well - SFC made promises they didn't keep specifically to get the very vocal and growing fan base from pulling a "3rd season of Star Trek" (FYI, NBC cancelled the original Trek after season 2 in the late '60s which meant they didn't have enough episodes to sell into rerun syndication; a major fan of the series - Bjo Trumble - started a campaign to organized other fans to write-in to NBC with "Save Trek" letters. NBC was flooded with letters and calls on their switchboard and brought Trek back for 1 last season which got it over the rerun-syndication hump and kept the series alive in the '70s).