I'm also having a problem with subscriptions -- in this case, to digital publications. I have 7 monthly reports, all sold by subscription. SquareSpace support recommended setting up a separate, password-protected members' area for each report. That creates a very awkward user experience, to say the least.
Plus, SquareSpace charges more money when there are multiple members' areas...so I'm paying all this money, and the solution still doesn't work. I blamed myself, but I see that others are also having problems with members' areas and subscriptions, so maybe I'm not at fault.
Is anyone having success setting up subscriptions to digital publications?