A simple solution for needing customized shipping dates after a subscription product, all you need to do is add those details into the product description, and then again in the purchase email notificaion. Let customer know when you will be starting their subscription at the later date. Once that dat comes around, then you would manually fufill that order start their subscription at that date. I would definately test out your subscription with an actual purchase (set the product price to $1 and the the renewal dates to weeks instead of months). A dry run of your subscription process, what you the merchant sees and your customer sees, is recommended).
THe biggest let down is Squarespace support wont help you if you have added custom code to the page you are have issues on.
This is why I will be recommending all of my squaresapce ecommerce clients to move to Shopify to prevent any future let downs that Squarespace cannot support on including:
- No tax exemption on specific products (you must apply tax to all products in your store)
- Only showing up to 100 products on a page for websites built with 7.0 (even though they advertise 10,000+ product display availability, a feature only available with a 7.1 website).
- Not possible to add free shiping to specific product (the only workaround for this is to offer free shiping based on weight total, and then adding tht weight total to the products you want to have frees shipping).