Could it do things like offer a yearly subscription with a starting price of $x and a recurring price of $y? Basically, like an ongoing maintenance - buy the product at $x and then pay $y for yearly upgrades/support.
This would only work if paying with Stripe though. When paying with Stripe, I create a Stripe customer via their API. So, I can come back later and charge that customer again whenever.
Edit: With some manual work, you could really do this as-is right now. After a subscription is created in Snappy Checkout, you can edit the subscription price, next payment date, or customer's name/email. This certainly would not be a good temporary workaround if you're selling these subscriptions like hotcakes right now though :)
