Survival Lobby's info (currently closed for matches, will only be open during weekends from 18:00 to 22:00 [PDT I'm guessing])...
Rewards:
Participation: 30
1 win: 50
2 wins: 150
3 wins: 200
4 wins: 250
5 wins: 500
The rules are:
12 Players
FF On
Unique Char Off
Enemy Nametags On
Silent Mode Off
Auto Teams Off
Team Switch Positions On
Ghost Pranks Off
TK Kick Off
Survival is not a new rule, it's just a gameplay mode. You play all the other rules (TDM, Res, Cap, Base, Sne, TSNE) and the last one standing wins. Time limit for all rules is 5 minutes with 2 rounds and 20 tickets for TDM/Extra time off for Cap.
Instead of making a room you make a team. Up to 5 other players can join your team. You then compete against another team. There's also a Survival Match List that list all the currently engaged teams in Survival Matches.