Foscam App Camera Sharing Limit

[COcatman]

I own a pet boarding facility. I currently use the IPCamViewer app to allow my customers to view their pets while boarding. I'd like to change for a number of reasons. The Foscam app is an obvious choice, but I understand there is a limit on camera sharing within the app. It's unclear to me what the limit is and how it's implemented. I've read that you can share a camera with up to 3 registered Foscam users.

1. Is 3 the correct limit?
2. Is that concurrent users? i.e. can more than 3 people be invited to share a camera, but only 3 can view it at the same time, or is 3 a limit on how many people can be invited to share the camera?
3. Does the limit include the original account or is it 3 users in addition to the account that sends the share invites?

I'm really hoping that the limit is higher than 3 since each camera would need to be shared among my 2 managers plus a customer and their spouse at a minimum.

Thanks for any help.