One thing in your post makes my wonder why would you say they have "very tight" when it comes to multi-account user? Have you seen some examples of alt accounts banned or something?
Multi-accounts is completely against the rules of the platform, because it's a faucet, what means that if everyone decided to use multi-accounts, their business model would be completely unsustainable and would have to close down, just like many faucets had to do in previous years due to abusers and cheaters. Imagine if each user created an army of accounts to take advantage of the hourly faucet, while referring each other in order to maximize the profits made. All the money to pay these multiple accounts would come from freebitco.in's pockets, so the business couldn't afford so much losses.
For that reason they are a strict policy against this practice, which is fully endorsed by the community, because legit users know that is what they have to do in order to keep the platform running for all these years. Unfortunatelly now we are seeing lots of issues going on with the website, but that is regards another matters, anyway.