I dont know whether someone has seen this or invested in this but is this for real??
No! This is just another ponzi scam made exclusively to steal peoples money. Or do you expect someone to give you 200% interest that easily? DO NOT "INVEST" OR YOU WILL GET ROBBED.
Does people put their money into these??
Yes they do. This site is adverting a way to earn 200% of the amount deposited in just 6 days and people want free and easy money without having to do some work. That's why those scam sites never stop appearing.