People know that there are some people who are real greedy that's why they made that plan to give people an offer which we can read on the link you provided that it is a lie
If people are too greed and careless, they will be easily attracted by "too good to be true offers". By ignoring many red flags of such offers, people put themselves into scams which can be abundant around them, but they can avoid all of scams simply by being careful and not too greed.
They target people who's curious on everything appealing they see and those people who's seeking for something they can get money online. That's why this warning serves as a warning that we should not click any link came from unknown sources.
It's your good advice to be more careful practically in order to avoid scammer traps. Scammers use nearly same scam methods with time and they don't change their methods too much but careless people continue to be scammed because of their carelessness. If they want to avoid scam, change themselves and their practice first as hoping scammers to change is impossible.