Hi Tina!
Thanks for getting in touch with us!
Unfortunately, those are not built-in functionalities of our plugins.
Purchasing additional rides could be achieved by creating additional tickets for an event. However, subscription or membership tickets is not something that can be accomplished with our plugins out of the box. Mainly because of how the check-in process works by allowing only a one time check-in per ticket.
I know some users make use of the WooCommerce Memberships plugin alongside our plugins, but I’m not really sure if they handle membership check-ins like you need.
I’m sorry I can’t be of much help here. Let me know if any follow up questions.
Best,
Victor