50% of trading fees paid on Ethfinex go into a pool for the holders of Nectar tokens (NEC).
By adding limit orders onto the order book, which are later matched and executed, you earn NEC tokens, distributed every 30 days.
The total number of NEC created each period depends on the amount of trading fees paid during that month. Each period the rate decreases according to the equation:
issued_nectar = fees_paid * 1000 * (2 - totalSupply / initialSupply) ^ 2
Each 30-days as the totalSupply increases the rate therefore decreases.
The amount of NEC you receive is therefore a function of the above equation AND the amount of fees Ethfinex receives in the month period (and what proportion of the maker volume is yours). It is therefore difficult to estimate, however visit your Loyalty page to find a live NEC reward amount.
Find out more on the Ethfinex blog at blog.ethfinex.com or log into your account at ethfinex.com/nectar
More information to monitor statistics about the Nectar token are available at https://nectar.community