This is the maximum number of slots provided by the TS3 host. As far as I know, there are no plans to expand it or pay for a bigger one because not many people use it consistently. Edit: I haven't poked around on the TS3 for a while, so if it's consistently being used every day now, I wasn't aware of that.
Usually only handful of us are on, so you should not find it difficult join...plenty of room left for you
I've always figured that not many people used it because most server owners already have their own VoIP solutions set up.
I don't think this is a good idea… I don't think a lot of people are going to want to be verbally harassed for support by those with short tempers or impatience. I think a better (intended) use of it is to use it for fostering friendship and comradery in the community.
If it fills up, half the users on this site own machines / servers and can easily host one themselves.
We don't really advertise it much, so it's not a very "mainstream" feature of the community. But if you can't join it, I don't understand why you're complaining then, hahah.