or on telegram or on Instagram or even on Tinder (no jk).
In all those cases just use common sense.

Why would a stranger contact another stranger on the internet and give him a way of making a lot of money?
If you would be the person knowing this method, wouldn't you first ask your friends or relatives for help or some friends of your friends?
You have 2 BTC blocked in an exchange and you will trust a stranger to withdraw them and send them to you? Seriously?

It's more than a year since a real flood of fake exchange and gambling sites that require a deposit to withdraw has started and it seems like it is not going to stop any time soon, people simply don't learn!!!!!