Depends on the ethical point of view

In my opinion these sites should not exist because they are created by thieves.

But there are a lot of people who look at these sites as a game and if in case these people are stolen they just look like normal.

Like a game where you have both a winner and a loser.



Of course people invest in these ponzi sites, if nobody invested in these sites ponzi you think someone would waste time creating a double script?

Hyip and double sites have their own niche market.

People invest money in this crappy site, unfortunately.