Funny fact - if you ignore all the email, the services should care that they delete all private data. Or you can reply to all these emails with the request: Please send me an export of all personal data you stored in the last years.
It's a best practice to notify users when a company policy on privacy of user data is updated, including updates on Terms & Conditions that have various rules for users to follow [1].
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[ 2.7 ms ] story [ 16.2 ms ] thread[1] https://termsfeed.com/blog/update-notice-legal-agreements/