Elon Musk offers voters $1 million a day to sign PAC petition backing the Constitution. Is that legal?

Elon Musk is pledging to give away $1 million a day to voters for signing his political action committee’s petition backing the Constitution

Elon Musk offers voters $1 million a day to sign PAC petition backing the Constitution. Is that legal?
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Elon Musk is pledging to give away $1 million a day to voters for signing his political action committee’s petition backing the Constitution