no issue
- The flag has not been used and can be removed, to make the `members_subscription_settings` JSON record in `settings` table easier to read.
- It used to indicate Stripe configuration being present. Currently that is checked by looking up if Stripe config's `public_token` and `secret_token` values are present (example - https://github.com/TryGhost/Ghost/blob/3.11.0/core/frontend/helpers/ghost_head.js#L54)
