Shopify affilate

Hey guys there is not much information about shopify affilate. I am interested about the money you get i mean i know its 200% bounty – Is it for two month only doe or it is going every month if they are paying consistantly. Lets say i get someone on 29$ basic plan i get paid first month 58 second month 58 third month 58 and all the way till they stop paying? Or is it just for the first two months 58 dollars?