We were instantly challenged however, so make sure to take some time to actually visit the dark zone while we control it, and get ready to defend the rail over the weekend.
It seems to me that unless people eventually get bored/discouraged of contesting, DE will eventually need to adjust either the duration of the challenge or the duration of the "preparation for the next challenge" - Dark Zones being available only every third day, while the challenge missions are a bit lackluster (other than for the Tenno specters, which are conceptually really cool - even if Trinity is the only real danger :P)
Also, seems likely to me that a big alliance with a lot of active people will eventually, through tax, earn enough to completely dominate the Dark Sector landscape, to the point where it'll take a huge concentrated effort to dislodge them from individual Dark Sectors.
And yeah, I really don't think the "NO TAXES!" crowd are going to get very far in the long run, as they will never be able to offer Battle Pay, and as a result - as WE saw - people will not fight for them, even if the challenging battle pay is only 200 credits.
It's an interesting feature though, and one that has quite a lot of potential in the long run, if they iterate on it.