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If the salt changes daily, how is. It possible to know how many users returned after > 24 hrs?

Edit: @lindesvard- Got it, thanks for clarifying!

You'll never know any returning users after salt changes. This is the hole point with privacy first.

But you have options tho. Compared to other tools that is privacy first, you can actually pass your own user id. You can get this ID from where ever you want (db, cookie, localStorage. Its up to you whom implement it)

But I want to have a middle ground where privacy is important but you have the options to decide what path you take.

So maybe an obvious question but just to be clear, if you pass your own user ID you can track that particular user's flow across multiple sessions/days/etc?

Yes! So its a matter of priorities. Is privacy or retention most important? Than you can decide how to track users.

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