New and pre-existing tie-in merchandise was still making money and a lot of interest still existed (as evidenced by said sales). The lull after ENT was basically a mini version of the '70s except there was a helluva lot more going on in the mid 2000s given the Internet and the amount of new merchandise available.
Star Trek wasn't in obscurity in the 1970s nor in the mid 2000s.So nothing ever "saved" the franchise, even if they resurrected it from obscurity and made it commercially viable (TWOK, TNG, Abrams), except the second episode, when there was no franchise to speak of. Perfectly logical.![]()