Normally, earn $50/month is impossible.
But if you can make a lot of people join faucet with your refferal link / you got big jackpot, it's possible
Or you can try bitcoin faucet & gamble it until you earn $50 in bitcoin

gambling is not good advice, he will not get $50 even if he is gambling he will lose all.
Not necessarily. He could get lucky. With gambling you just have to know when to quit though I would definitely not recommend it as a source of income as you are more than likely to lose and will eventually, but what i initially said still stands.
in theory it look easy, when we have to stop. but in reality it is difficult. I have always lost in gambling. and in fact I was just fun to play gambling, and it is not the source of my income.
but occasionally I also get a big jackpot on gambling. but still more to lose: D
and now I'm still stand.