I would like to know how much it is to add additional user accounts for viewing submissions? I must be missing it in the FAQ's or pricing guides.

I would like to know how much it is to add additional user accounts for viewing submissions? I must be missing it in the FAQ's or pricing guides. 

Submission data can be shared via reports:

https://www.jotform.com/help/chapter-6-Reports

The submission page can also be shared directly:

https://www.jotform.com/help/199-How-to-Share-Form-s-Submissions-Page

The sub-user feature was disabled with the exception of Enterprise users:

https://www.jotform.com/help/232-How-to-Share-Forms-with-a-Sub-Account-User