Ancestry have updated their terms and conditions and privacy policy.- as of 17thJanuary 2024
It appears that they will soon be allowing DNA uploads from other testing services.
The Terms and Conditions now expressly prohibit “allowing unauthorized third parties to access Services using your credentials” — meaning no sharing of log-in information
See full terms and conditions 👉https://www.ancestry.com/c/legal/termsandconditions
Also see The Legal Genealogist post 👉https://www.legalgenealogist.com/2024/01/18/another-ancestry-tos-update/