Here in Australia, Voyager is one of three star trek shows on constant re-run/rotation on network TV, the others being TOS and TNG, and I often asked myself why this is... why don't they ever screen Deep Space Nine?
The only answer I can come up with is that the nature of DS9's story arcs makes it less attractive to syndication, as when you're 'stripping' a show five nights a week, you want it to be as accessible to as wide an audience as possible, and any show where if a viewer misses out an episode, they might potentially lose the arc threads and therefore stop watching... I figure this is the reason because I've noticed other popular but very arc-heavy shows are never rerun either, but afternoon TV is full of episodic classic TV... but DS9 feels conspicuous for being the only Star Trek show the network doesn't syndicate. Even the more dedicated Sci Fi channel over here avoids it, whereas Voyager has got a seemingly infinite shelf life in re-runs. Whatever praise DS9 gets, ironically it's the least visible and hardest to find Star Trek on TV. The three other Trek shows mentioned have been screening on rotation day in day out on Aussie TV for at least a decade now, but DS9 (and, to be fair, Enterprise too

) has never been seen after it's original run in the 1990s. Voyager's episodic nature, it seems, is actually a strength.