And what happens is, people fall for such offers and go ahead giving their so-called "KYC" which they regret in future as to why they committed such a mistake? Regrets take place when hackers and other companies rake in these databases for not even a penny per KYC sold in either dark market or a direct sale. It's really not advisable to give KYC to anyone until they're secure enough to keep it safe from attacks and theft.

@OP,
I've my friend playing at duckdice where you need to wager around BTC0.5 and you'll get 500 Satoshis as faucet (capped to max 30 faucet claims per day). He already tried it and checked the withdrawal process, and he told me that it's instant. For your faucet part, this one's a better option than going for freebitcoin because if I'm not wrong, they're not even giving half of what you'll get at duckdice.

Airdrops are fine as far as project doesn't need KYC. Still, if there seems something more of a value added to the project through blockchain, giving it to them is fine but at your own risk because nobody knows the intentions of anybody's mind as it is crypto - where they get everything while either keeping their anonymity maintained by hiding their identity or using someone else's identity with a different name in order to scam ahead after ICO is successfully completed.

Cloud mining? Think again.
https://bitcointalk.org/index.php?topic=878387.msg9697654#msg9697654
Read this before going for it.

Advertising is good, but the pay rate is definitely not competitive if we compare it to Google AdSense, still a better alternative.

Even you can earn Steem for sharing stuff at their social media and there are more social mediums you can use to earn altcoins (like VIB) for being socially active and sell it for BTC. Still, free BTC after exchanging it.

The best thing is to use your skills and get paid for it, it is also considered free here. Showcase your talent here and get paid BTC for the same.