I remember when all that population stuff went down on SOE's forums. It was funny and sad all at the same time.
I've been with SWGEMU from the very beginning and will see it though (to hopefully a release of their own server). The project has surpassed my expectations, especially with those few first years which were a bit of a rocky road. The contributors (devs, QA, mods, testers, etc) have done an outstanding job and we all owe them a million thanks.
As for the financial bit- I think as a finished product gets closer more people will come back. There are a lot of lurkers. A lot of people either:
A- Don't want to test
or
B- Don't want to spend so much time into a play server that's going to get wiped
I wouldn't ever worry about support, JTL or not. The daily population is very healthy for an pre-released play server. In fact, I think it is more populated than Shadowfire was for most of it's history. I never have problems finding people, even in the most remote places and cities.
The only thing I think about sometimes is when is the project truly ever going to be "done"? There will always be bugs. There will always be something to work on. I started following EMU without kids. Now I have one old enough to play with me on the server! I would be completely fine with a release without JTL or jedi implemented, just like when SOEs servers went live. I just don't want to be a grandpa by the time things are "done"