One of the rules of participating Crypto.Games Signature Campaign:
4. Only one account per person is allowed. Alt accounts will be banned from campaign without getting paid during payday. Leave the campaign if any of your previous alt accounts were banned!
And COINS.GAME Signature Campaign
You, a person, are not allowed to enroll with more than one account.
Crypto.games rule isn't allow ban evader and cheater to join in their campaign, while Coins.game rule isn't allow cheater.
Both of them participate in different campaign, when a campaign manager said only one account per person is allowed, it's not mean the other account can't participate in the other campaign.