I don't think the 1 BTC is from the faucet its probably some giveaway. I never used that site before so I don't know. Either way the free faucet is probably around 1000 Sats or less and has a time limit and a captcha solver so its a waste of time.
Giveaway from faucet site? i dont think that they really have this kind of promotion, because based on their site, they already give you free money, why they want to make some promotions again to give you such a huge money? What i know using some captcha solver will cost you more than you get though. So it is still the best if you manually click it, hopefully that you will hit 10000 and earn 0.3 btc