It's pretty obvious you can't register more than one account through the same internet line or IP, because freebitcoin isn't solely a casino, investment platform or exchange, but a faucet which rewards free satoshis prizes hourly.
The account limitation per household is a necessary measure to keep the site operational and sustainable, otherwise everyone could create dozen of accounts and justify they belong to their relatives...
Sadly, this kind of traffic is one of the reasons why faucets have died or are so difficult and bureaucratic to be used nowadays.
It's not forbidden to have more than one account (if nothing has changed) as long as you're not abusing faucet, self referring and abuse their website in other ways. But offcourse, if you will get caught abusing website with multiple accounts, all your accounts will be banned.
It's not the easiest to locate either. The contact form is within their FAQ page and you need to be logged in for it to show up.
Good point about contact form, it's not that easy to find. And considering that who need to access it often don't have access to their accounts. They also have email
[email protected], but I don't see it listed somewhere on their website.