Sign in and Log in are the same thing. Anyway I don't have anyone to play with right now, so I'm just going to congratulate on the suspected Metafab integration.
Edit: I really like the idea of having to go towards your enemy to get your ammo back. Forces some interesting gameplay. However I took so much damage from walking into the spear after they threw it if I already had a spear! lol
Also I don't think my balance changed after the game. So not sure if Metafab integration is working properly