Thats what I was informed by my lawyer.Both of these (CY 60day and GE hnwi) are certificates issued based on domestic law and they will be disregarded for the purposes of double tax treaties, which have their own tests for determining tax residency.
As noted with 60 days rule in Cyprus you would lose tax residency of you are tax resident somewhere else - the fact that the cyprus service providers often fail to mention.
Valid tax certificates for treaty purposes are always issued based on the tax treaty and this will be clearly mentioned on the TRC.
If it is mentioned on the TRC is not good. This would be red flag for other high tax country