Why would Netflix or CBS go with Star Trek if it a proven loser on tv?
With the exception of Enterprise and the original run of TOS, Trek had consistently good ratings. TNG did awesome in syndication, and DS9, too. Voyager was UPN's highest rated series.
Heck, even TOS reruns do pretty well in ratings.
Trek on first-run TV has two loses, three wins. TNG era Trek was popular enough to spawn three spinoffs, which is a record for anything not All in the Family.