You won't find many good faucets around. It's not an extra income anymore, as it takes too much time to claim from most faucets and the rewards are low.
The only advantage of faucets is if you will save your satoshis for the future, so when BTC price skyrocket, you will see your little earnings from faucets gaining value. Let's say Bitcoin increases 1000% its price, so your earnings will value 1000% as well...
But if you want short term profit, faucets aren't for you...
It certainly is the case that it's worth holding on to your Satoshis to see what happens to the price in the future. But there are ways of increasing your faucet earnings to something meaningful. Building up a circle of referral is one way of increasing your income quite significantly.
It's true, with a good circle of active referrals you can have a nice passive income from faucets. The problem is that like us, our referrals don't like low rewards too and they won't claim if there aren't good faucets around. I don't know if owners of faucet lists/rotators are being successful in referring people to faucets, but the only faucet I managed to get few active referrals were FreeBitco.in, other faucets I get some referrals, but they become inactive really fast.
This is true, but claim rates have stayed broadly the same for a while now - on many faucets they go up and down in line with the prevailing bitcoin price but the base value is the same.