You can also redirect visitors to other faucets with your referral link (better to be a bilateral step between the faucet's owner)
Between 2 diifferent faucets (with different admins ) , yes, but advertising another own faucets (both with same adsense account) it's suicide , Adsense will terminate your unique adsense account under the reason of forced traffic .
I think it's much safer for the own adsense account to have only one faucet instead of 3 with same users.
Yes I mean between the different owners, it was used before but now I didn't notice it happening anymore..