With hundreds of thousands of combination or even millions, I don't think anyone can guess the right 6 digit code after I guess I was redirected to a faucet where I can claim 10 sats for every 30 minutes, not an attractive way to invite people as it's impossible to guess the right 6 disit code it's just a cloak so you can invite people to join your faucet.
i agree that guessing the correct numbers maybe hard but every guess rewards you with 10 satoshi that may increase with time but the number will not be change until it guess right and evry day some one guess 6 number to win a lotto