one satoshi is 1/100,000,000th of a bitcoin. So you have 1 BTC you would need one hundred million satoshi. 1 bitcoin is worth less than 2500$, to become a millionaire youd need roughly 400 BTC. Youd need 400,000,000,000 satoshi to become a millionaire.
Short awnser, you will never ever ever gain any substantial amount of money with faucets and satoshi earning sites. Not even 10$.
Hmm - sure its possible to earn more than 10$.
Also it is possible to become a millionaire with faucets - if you run some or with affiliates.
So it's not impossible