The Rockstor Project is now a non-profit Open Collective.
(1). First visit: https://opencollective.com/the-rockstor-project
to obtain "Stable Updates subscription" membership (shop password sent in membership email).
(2). There-after, when enabling Stable Updates from within a Rockstor installation, use the emailed shop password when encountering this message.
-- Payment for our Stable Updates subscription is now via the above membership. No payment will be requested/required at this shop (100% discount on indicated price).
-- We plan to remove the 'shop' requirement entirely when resources enable the development time required.
Our apologies for the current run-around.