just have the following in mind:
you are wasting your electricity
You are spending your internet (your Mb)
you are wasting your time
So you really think that this somehow pays off? ok you can tell me that there are people who watch movies online, others watch porn, others play online and are spending the same thing, but at least they are somehow having fun while the faucets are tiring and you run the risk of not receiving your payment.
Wasting electricity. That's correct. But faucet earnings can cover electricity costs at least. And if I wouldn't use faucets my PC still would be turned in and it would use electricity. I would have fun time watching videos, playing games, but it would be just a waste of time.
Spending internet. Well, I think that mostly people have unlimited internet plans and they don't need to worry how many Mb they spend.
Waste of time? Maybe yes, there are many more effective ways to earn money. But for newbies faucets can be a good choice. Risk that they wont get paid is minimal. It's less risky than to join unclear bounties and airdrops.