There are some serious failings of the Subscription service that need to be addressed by the developers. I attempted to contact the support chat team, but I was blown off with a "we'll bring that up to the developers". ...I'm in I.T., and that means "go away" in polite speak. Yes, this is a bit of a rant but I hope someone from the development team spends two seconds reading it and fixing it.
Let's start with the lack of data transparency specific to subscriptions. There is no way to obtain an export of any of the subscription data. Not through the products export, not through the