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Oh yes we have.
Go to your Peakd Settings.
Scroll down to find the menu for "My Referrals"

I believe that's somehow embedded in the chain, not PeakD-specific. I remember it was from the old chain, for 30 days, to receive a portion of the referrals' author rewards. Probably not all interfaces mention it because it's rarely used.

Got it. I thought there is something else behind the beneficiary reward setting.

Yeah, all it does is automatically set yourself as a post reward beneficiary for the account you referred.

Not ideal.

Ohh I see. They can also remove the reward beneficiary, right? So it's not really a tangible referral reward.