Binance dual investment a scam?

I had invested 152.6 ADA in dual investment with the strike price of 1.10$ from the date 2022/01/11 to 2022/01/14 with the APY of 499.96%

I had opted for "Up and Exercised"

This is the equation of how the return is calculated on binance's FAQ

(Subscription Amount * Strike Price) * [1+(APY% * deposits days /365)]

Using this calculation, I'm getting the return of roughly 870$

Since I had chosen up and exercised and as expected the price had gone up, I got back only 174 BUSD back

Did I miss something or should I avoid using the earn options in Binance?

Could you guys help me understand how this works as the FAQ on your page doesn't have an option for dual investment nor can I find a live chat to binance.

Would be great help, thanks!