When they read such promotions or ads where they can make money by just chatting, they will try their luck and pay 50$ to the OP and will get nothing in return. These scammers' business never stops because some greedy and blind people exist in this world who will always be looking for shortcuts to earn easy money and in the end, get scammed by these scammers.
It's more like a common sense thing. No matter how much money someone can offer them, they must understand that money is not like the leaves of some tree. Either you have to work hard, or you have to invest in your business to make money. If people are dumb enough to fall for such things, they actually deserve it.
Let's say we are talking about it in this thread. Still, if someone falls for such scams, they surely did not see the discussion or decide to avoid us.
Honestly, I think that someone that naïve can't be protected. Even if every inch of the page had been full of warnings, he still might've fallen for it,