Apparently Trek on Netflix does very well- mainly TNG, natch, but DS9 and VOY are gaining new followers and appreciation also. If Netflix bought back Wet Hot Summer and Full House, it's not unthinkable (although admittedly, incredibly unlikely) that they could do a DS9 reunion movie. How cool would that be? Jake and Molly and Nog and New Dax (Jayden Smith) go searching for Sisko in the wormhole.
No. They brought back those shows because they were low-risk, high reward. Voyager, DS9, Enterprise, even TNG-- they are high risk, low reward. Best case scenario they have to spend a ton of money assembling a lot of talent and constructing massive, expensive sets, with tons of visual effects, and even under the most optimistic projections they would not garner huge viewership.
Yes, Trek is very popular on Netflix. That is why Netflix asked CBS if they could produce a new Trek show. What they didn't do is ask to reignite one of the older series'. If they thought that could work, they'd tried to do it.
And no, that would not be cool. No interest in seeing those characters again, and DS9 is in my opinion the best of 90s Trek (if not my favorite).