Hello @Joshua_Tree_National_Park_Association ,
This is our standard since some of these different add-ons have different ways of being billed, or are fully contracted as professional services. If you call our general support, they can do a mass-selection for most of the add-ons and extra services available on a requested basis, but would need to go through the billing confirmations for each one. Otherwise there is no big list of all possible , payable add-ons within an account at this time.
If there are specific add-ons you're wanting info on, just let us know. Some add-ons, like archive and advanced form customization, are available by default with Email Plus accounts.
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