Yes and No. The subscription goes out to Tableau Server and pulls the viz, renders the snapshot image and sends it to the recipient. You can view the activity in Tableau Server and filter on the action type View Subscription Sent.
I think it's important to understand that a snapshot (subscription) does not constitute interactivity. There's a record the view was queried and sent to a user, but unless that user opens the dashboard, they're really not looking at the view.
Hope that helps.