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Nope only before, its not exact snapshot per definition as you need to link address. But then on the date they snapshot amounts on the addresses linked and bytes that those addresses use.

But ie ive been to their other 2 snapshots so now my adres is there, i dont have to update it at all, just need to have some funds on it on the right time

This is a poor method of distribution then. And likely to harm its long term value due to a lack of effective ownership network effect. Dump while you can :)

Yes so snapshot is real but only if you link address you are eligible to get anything ;)