I clicked on withdraw and added an address I don't use. And then I burst out of laughter to see that they had requested a deposit of 0.025 BTC before I would be able to withdraw the bonus. It was so obvious a scam but I wonder if there will still be someone so stupid to fall for such lazy scams. There might be people though, our of greed rush into depositing and eventually funds out it is just a scam.
This is one of the cheapest scam I have come across in recent times but just the way you said some people might still fall for it due to greediness. I have seen something similar to this before but my own was a different approach that allows you to deposit freely but puts a requirements for your withdrawal that can never be met. It was also a trading platform with a favorable price for arbitrage.
The scam here is very obvious because it is like a ponzi where you invest and make double profits of your investment. The difference between the bonus and what they ask you to deposit is double and you don’t need to perform any task. You don’t need a seer to tell you it’s a scam. Falling for this is not actually ignorance, it is foolishness.