Hi there Grant,
Thanks for reaching out to us and also for your interest in our products 🙂
I’m not much familiarized with ActiveCampaign but taking a quick look I see it integrates with WooCommerce (http://www.activecampaign.com/apps/woocommerce – http://activewoo.com/). Hopefully Event Tickets Plus works out of the box with WooCommerce. Also Woo has also various membership plugins to choose from so it seems like this could be a winning combo!
Regarding the specific features of the itnegrations, you’ll need to check each product details to see what’s possible. On our side, once a ticket is added to the cart it’s managed by Woo just like any other product.
Hope this helps, please let me know if there’s anything else I can do to help out,
Best,
Nico