How much information does Reddit take from Accounts? Is there a risk of being traced/doxxed from this?

I know Reddit collects information like user's likes, follows and comments. But I am worried about the exact level of how much information can be gained from a Reddit account, do they record the same passwords/emails that be used on two accounts and could be connected?

Maybe I am a bit paranoid but I would rather not leave an obvious digital footprint.

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