They moved on, life got busy and they realized this forum just really wasn't for them anymore.
Or Scragg decided they knew too much and has no imprisoned them somewhere deep in the forums where we will never reach them.
OR They went underground, having seen the atrocities caused by your subligarian empire and have made a resistance to counter your every move. :D
Hmmm, three equally plausible explanations...
It's just, you know I would at least say a farewell and stuff and would hope you guys would do the same if you decided to give up these forums out of respect for each other because we spend a lot of time talking and having lulz together, it's not like chatting here takes requires a commitment or anything.
Well the last two explanations almost require no farewells. The first one though, sometimes it's easier to leave something like this behind without a farewell. Coming back is not always something you want to do when you leave something like this, while it doesn't necessarily require a commitment to post here a lot of us post here more often than we probably should, and sometimes people just realize it's not right to do that after a certain point.
There's also the possibility that they became busy seemingly out of no where. While they're not trying to disrespect us it's extremely possible they simply left us behind by accident as more stuff in life started to pile up on them, be it because of family, careers, migration, or any number of other possibly stressful situations that could arise and take away most if not all of your time.