Is there any predefined measure for reducing this free faucet value when the btc price is increased and soon when bitcoin reaches its all time high, it may be reduced to 1 satoshi too?
I would like to share my opinion here, although TheQuin has replied to your inquiries. The base reward is equivalent to $0.002 from the hourly faucet. Mathematically, 1 satoshi will be equivalent to $0.002 if the price of Bitcoin reaches to $200k. But we will start getting 1 satoshi from the hourly faucet if the price of Bitcoin reaches near to $135k. But your case is different. You are getting less than the actual base reward. Generally, Freebitco reduce the faucet base reward for those users who claim the faucet always to gather free BTC.