Do not make the incentives for proof-of-caring too extreme or too enticing. Massive discounts or caps on tokens can hurt your credibility and encourage people who do not want to be invested long-term to spend an hour or two spamming or BSing. This hurts everybody, except, perhaps, scammers.
Proof-of-Caring: A Revolutionary Way to Avoid ICO Flippers
Robert Ramirez

excellent point

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