That's not true. All plans are affected, and once you "upgrade" to Oracle Cloud Infrastructure, you're moved to a Pay As You Go plan
>Now that this integration work is complete, Oracle is announcing the end-of-life of the DNS service in favor of our upgraded version on the Oracle Cloud Infrastructure Platform. On May 31, 2020, the “EOL Date”, the DNS will be retired and will no longer be available. The upgrade to Oracle Cloud Infrastructure will require some actions on your part and must be completed on or before the EOL Date.
>You can also upgrade when your current Oracle Dyn or Zenedge contract expires on [contact-end-date]. If you chose to not upgrade by the time your contract renews, your right to access and use the service will be moved to a month to month subscription governed by your current agreement until May 31, 2020. If you do not have auto-renew enabled, your service will end based on your agreement.
>Now that this integration work is complete, Oracle is announcing the end-of-life of the DNS service in favor of our upgraded version on the Oracle Cloud Infrastructure Platform. On May 31, 2020, the “EOL Date”, the DNS will be retired and will no longer be available. The upgrade to Oracle Cloud Infrastructure will require some actions on your part and must be completed on or before the EOL Date.
>You can also upgrade when your current Oracle Dyn or Zenedge contract expires on [contact-end-date]. If you chose to not upgrade by the time your contract renews, your right to access and use the service will be moved to a month to month subscription governed by your current agreement until May 31, 2020. If you do not have auto-renew enabled, your service will end based on your agreement.