Pool has pplns & pps ,
PPLNS is a way of determining how many cryptocoins you get for your shares completed. Pay Per Last N Shares is what PPLNS stands for.This method of calculating payouts includes a "luck" factor. Using PPLNS your payout per share will have a large range(30% more or less on your payouts), but on average, PPLNS earns more than PPS (by 5% or so) in the long run (a month or more).
PPS is also known as Pay Per Share. It is a more direct method where you get a standard payout rate for each share completed.This method eliminates the "luck" in your payout, but can decrease your total income per share by around 5%.Using PPS you get a set number of cryptocoins per share of work you have solved. It has no luck involved so the payouts do not fluctuate.
So PPS pool will charge high fee. like f2pool