zeptaras
Membership works as follows:
You pay about 9.99 a month (not sure if this is usd or not)
You immediately get 500 coins, over the 31 days of the month you get an additional 310 coins (roughly 10 per day, more on shorter months)
There is some confusion on wether the 500 coins is a first month only thing or 500 immediately every month.
Chances are high the 310 coins are expiry vulnerable.
Admit alot of this is speculation as the membership description is not at all laid out well or deeply informative based on wn policies so most are waiting to see people jump the shark when it rolls over in Feb.