Update wording for empty "Subscriptions and purchases" page
Problem
The "You haven't made any purchase yet" wording is not quite accurate. This wording shows up not only when customer hasn't purchased anything yet, but also when there are no active subscriptions (i.e. a subscription was cancelled). For example, this billing account had an active subscription, and it was cancelled; the evidence of this would be found on the Invoices page, as there would be an invoice listed.
Proposal
Change the text to something like this:
You do not have any active subscriptions
Active subscriptions and add-ons will appear here. To see your purchase history, visit Invoices page.