This is a common trick/scam in this space and isn't entirely new. Like I'll always say, only the greedy will fall for those kind of scams. There's no free lunch in Freetown! People need to know, these people asking you to send certain amount of ETH to receive a higher amount aren't father Christmas nor a charity organization. You almost need to work for all you earn in this space and that's the truth. Those who fall for such scams are just greedy and they should themselves for it.