What happens is that some people use bots to farm the faucet all day long. If they purchase the 100 RPs boost per claim (acquired in rewards tab), it's possible to profit extra 1100 RPs daily, plus the normal RPs users already receive by just claiming the faucet.
It should be pointless for cheaters. I guess freebitcoin can easily detect such bots on their website because claiming a faucet every hour is unreal for usual users. I mean that it should be suspicious activity even if a couple of dozen accounts claim 100 RP every hour throughout the day.
If they want to use bots, those cheaters should think about passing the captcha because they need to add some credit to have a free captcha.
With their good reputations from a long time ago, they will know if some people using bots to claim the faucet and Freebitco.in can ban their account easily, especially if they use something suspicious.
Freebitco will not stop monitoring all activities on their site and will check everything so the cheaters can not try to do something and steal the money.