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You can opt out of Shared Endorsements (mentioned in the new ToS) here: https://plus.google.com/settings/endorsements?hl=en

If you don't have a Google+ account, this link forces you to create one. So I can't access these settings and I do not want a G+ account.

I'm unsure if they still can use my info on shared endorsements...

Endorsements require an action on behalf of the user and therefor require Google+