they would just introduce a little game or scheme that seems too real where you would sign up with no amount and automatically specific amount would be credited to your balance and asked you to make withdrawal of it within 24 hours or 48 hrs before expiration.
In the majority of all the cases of scams, there is always this too-good-to-be-true offer that gives it away as a scam. Victims of these scams are usually individuals who ignore the red flag of the offer sounding too good to be true and choose to try, probably believing that they hit a gold mine or they're lucky to come across such an opportunity.
If you are still attached to or moved by free money, that is, at the promise of free money, you lose your sense of reasoning; you are just GREEDY.