The servers use Lithium.

If you want to be paid in a cryptocurrency other than Lithiums the current Lithium to cryptocurrency ratios for FoF are:

1 Lithium is equal to 0.00000001 Blakecoin.
1 Lithium is equal to 0.00000001 BlakeBitcoin. 
1 Lithium is equal to 0.00000001 Electron. 
1 Lithium is equal to 0.00000001 UniversalMolecule. 
1 Lithium is equal to 0.00000001 Photon. 

 

Kill Awards

All kills award 0.01 Lithium. The player balances shown on the website are updated every 30 minutes.

Cheaters
Cheating is strictly forbidden, if you suspect another player of cheating report the player to game admins.

Stats Calculations
A new player has 1000 points. Every time you kill another player or bot, you gain a certain amount of points depending on a) the victim's points rating, and b) the weapon you used. If you kill someone with a higher points rating than you, then you gain more points than if you kill someone with a lower points rating than you. Therefore, killing newbies will not get you as far as killing the #1 player. And if you kill someone with your knife, you gain more points than if you kill them with a rifle, for example.

When you are killed, you lose a certain amount of points, which again depends on the points rating of your killer and the weapon they used (you don't lose as many points for being killed by the #1 player with a rifle than you do for being killed by a low ranked player with a knife). This makes moving up the rankings easier, but makes staying in the top spots harder.
Specifically, the equations are:

 Killer Points = Killer Points + (Victim Points / Killer Points) × Weapon Modifier × 5

 Victim Points = Victim Points - (Victim Points / Killer Points) × Weapon Modifier × 5

You can find the current weapon modifier values by clicking here.