Hey you can Buy Olives if follow this way...

Press:

NF Store -> Olive Store

Than you can purchase Olives with Paypal, Kreditcard or go cash.

If you press Charge, you will be redirected to the next page...

If you have any further questions ask me :)

Right now the olive attendance is suspended.

The only way you can get Olive is purchase them using real currency (paypal, credit card etc)
And I remember there is some sort of "gift card" that can be used to purchase olives too (if I am correct) 

Attendance checkin will be activate again in near future.  :)

Vinnson