I’ve played on this server since December 2015, and whenever I come on the website, I see the S & C server online 99% of the time, but to this day, I have never seen the FTB or Pixelmon server online. Are these servers dead, or am I just not on the website a lot? 
they come and go.
depends on who wants to run it and how many people wanna play.
Cant speak on behalf of FTB, but Pixelmon I can tell you that a bunch of us staff attempted to make an adventure map with gyms, quests, unique Pokemon spawn areas, and a reward for players to play in a survival/creative mode upon succeeding to build their own establishments (Key word: attempted). We made a few cities, a couple gyms, some interesting legendary locations, however the work on this came to a halt because most of us wanted to play more on PCB’s main server rather than waste our free time building a full fledged adventure map. It lacked an active team of contributors, and Shadow was hosting the server (I think?) and he got busy overtime and most should know he is on/off active to our server which is why it eventually died out.
That sucks, really love Pixelmon etc. If some people would want to start it back up, just PM me or Mark
Actually, it was being shared on the same server FTB was running on. While I do not know do the specifics as to what happened with the actual server, I do know that FTB tends to come and go hahaha.
Edit: Here’s the reason: http://projectcitybuild.com/forums/index.php?topic=13281.msg134809#new
I have said this before. But i know a small ftb community that runs atm FTB Beyond version 1.5.3 ( we change pack so now and then for new stuff)
and we can work with this community. Ruby and fatso have tried it out and I’m admin there.
I won’t post the server itself as it will probably be seen as advertisements, but if people are interested in ftb mod packs
we can open up a bridge between the 2 communities