I shall have two projects, one for subscription and one for online marketing.
1. For subscription, I need to have a Gatekeeper to check whether the visitor is a subscriber. Also I need to keep the subscriber's reference and datetime in order to avoid multiple users for single subscription.
2. For marketing, I need to have a shopping cart that can allow to indicate different advice according to the total amount for items so selected.
Experts' recommendation or suggestion will be deeply appreciated.