My rig turned off before the block was found. Will I get a reward?

We use PPLNS reward system. Our pool calculates the percentage of shares you send in the last N shares. Block reward is shared between miners proportionally to this percentage.

Depending on the pool hashrate it takes some time (usually a couple of minutes) for the total amount of N shares to come up. 

Therefore if your rig switches off a couple of seconds before the block was found - you would get you reward completely (as it was turned on). If it turns off 15 minutes before the block - you get nothing.

2Miners mining pools: https://2miners.com/

2CryptoCalc mining profit calculator: https://2cryptocalc.com/