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Check here. Dunno if it is still relevant though.

The referral link can be used on PeakD to create a new Hive account via Hiveonboard.

In exchange the accounts are created with default beneficiaries to the referrer.

Yes ! But you get the referral bonus directly from the referral pockets. They give you some of their earnings so it's not really nice if you don't tell them :)

This is important to make clear, cheers.

And your referrals can remove you as a beneficiary immediately if they please.