Here is a list of Reddit subs for crypto airdrops and giveaways that I have compiled in the past year.
I am mainly using this list to spam my referral links and Leo posts but occasionally I will find the odd gem too.
My suggestion is to use it with caution and link drop only two or three times a day, also make sure to change the title of your links from sub to sub instead of using the same one again and again.
Why? Well if you spam too much or use the same title again and again you increase your chances of getting ghosted by Reddit, which means it will automatically hide all your posts to other users.
Enjoy:
https://www.reddit.com/r/Crypto_Airdrops/
https://www.reddit.com/r/CryptoAirdrop/
https://www.reddit.com/r/cryptogiveaways/
https://www.reddit.com/r/beercoins/
https://www.reddit.com/r/clicksforbeermoney/
https://www.reddit.com/r/FreeCoins/
https://www.reddit.com/r/referralcodes/
https://www.reddit.com/r/beermoneyglobal/
https://www.reddit.com/r/Bitcoinfaucets/
https://www.reddit.com/r/coinfaucet/
https://www.reddit.com/r/cryptofaucetrefferal/
https://www.reddit.com/r/CryptoFaucets/
https://www.reddit.com/r/freebitcoin/
https://www.reddit.com/r/FreeCoins/