Definitely email former Members, preferably with discount offers to re-join.
But for current Members I would email them non-paysite (or other paysites) offers until they unsubscribe. Do not put your paysite on the mailings (the one they joined) but send them dating offers, cams, products, etc. Chances are they will just unsubscribe from the mailings rather than cancel and you may get some affiliate sales this way.
Have luck!
