My mistake i was on mobile when i see the ad and i didn't do much research therefore i tested only on that amount.
I am glad that now it appears on GOOGLE quickly by name as SCAM and warning others.
$450 is still a big amount to test and get a scam but anyway we have exposed this now as a scam exchange I Google it and the first site that appears is this thread those who will sign up and use this exchange will do their research first, and hopefully you're the last one person to have used this exchange and they can't scam anymore.