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/