I think your discount is pretty fair for a 1 year commitment. Wouldn't change anything. If you do decide to increase prices at any point, consider grandfatherin

I think your discount is pretty fair for a 1 year commitment. Wouldn't change anything. If you do decide to increase prices at any point, consider grandfathering your current customers into the old pricing to not piss them off, as long as they are still netting profit for you. They're probably your best customers for adopting and committing so early and will probably be some of the best word-of-mouth spreaders and sources of free advertising for you.