As the saying goes, if it sounds too good to be true probably it is, crowd funding is probably for investment or someone trying to raise startup capital, how on earth do you expect new business to pay out such a huge amount?
It doesn't matter actually if it is a new business really,because even the company which was started let's say 10 years ago
and is doing great,cannot even get close to let's say 2% a day.
And all these scam sites claim that they can make 10% a day without any problem.
If you cannot see a scam in this,then you just shouldn't use bitcoin.