Being able to have the flexibility you're describing on a Shoppable Landing Page is a great feature request we have tracked in your account. However at this time we do not offer the ability to set up a reoccurring payment. As for the amount of products you can have in a store, at this time our free online store allows up to 3 products. You can upgrade your account to the available Starter Plan to use up to 10 products, or even our Business Plus Plan to have unlimited products available. You can view the prices for this under the Websites & Stores tab in your Constant Contact account, clicking Manage Your Sites, and then clicking Plans & Pricing on the left-hand side of this new page.