Probably they got caught by the licensing ban of the show that happened around 2004 and couldnt get it. Sailor Moon was banned from licensing outside Japan for several years. They had to stop broadcast it in my country in the middle of the R season because of it.
It wasn't made available. Everyone involved with Sailor Moon back then (Cartoon Network, YTV, Pioneer, Optimum) all expressed interest in Stars, but it never got picked up.