1/ Is it possible to have to have a customer submit their email address and be sent automatically a one time discount code on their first purchase?
2/ Is it possible to do a referal discounts for customers?
3/ Are the discount codes one time per customer...same customer can't use it again? So I have code "blah blah" and everyone can use it, but they can only use it once. Or can the code be used multiple times until it expires?