He has mentioned already that those 400+ referrals are not active ones, so they do not generate any revenue. No matter if you own 1000 dead referrals, they are just useless. I once tried to get referrals through facebook crypto related groups but later found that only the newbies in crypto are attracted to these faucets. Once they become experienced, they find other better ways to earn crypto.
Yeah, I think almost everybody first starts with claiming from faucets when you are new to the cryptoworld. It is easy to start but the rewards are too low for the time you spend on them. Freebitco.in is the only faucet I still claim from time to time because it also offers other things than the faucet.