Sci, once again you underestimate the classic series. It ran for a full 26 seasons before it was canceled, so it's hardly a little-remembered show. Unless you mean the United States, but in Britain the show has always been a huge sucess.
I should note that the perception of
Doctor Who in the United States and it Britain are
vastly different, and the audiences are
massively different. In Britain,
Doctor Who is concerned "family viewing." There is no such thing in the United States, and that's part of the reason why the BBC made such a hash of selling the Eccleston series to the United States; they assumed that they could get premium dollars for the show in the United States, not understanding that, on this side of the pond,
Doctor Who is rather niche.
Even when it was cancelled, there were numerous attempts to revive it
There were attempts to revive the series. However, the BBC was their own worst enemy in trying to revive the series. Did they want a big-screen motion picture? Did they want to do direct-to-video films? Did they want American co-producers so they could produce something that wouldn't look embarrassing next to American science-fiction series? Different people wanted different things; they knew they had a concept that had name recognition, but no one quite knew what to do with it.
...and a well-selling novel line.
As I understand it, the New Adventures sold between five and eight percent of what a contemporaneous
Star Trek novel would have sold. And probably about three percent of a contemporaneous
Star Wars novel. They sold well enough for the line to continue, which may be the only thing that really matters. But they were pitched at a niche, rabid fanbase; these weren't the mainstream bestsellers that today's New Series Adventures are.