Sorry, I have looked at your case closer and... the address the email wanted to send the money was your own freebitco.in deposit address? Basically the automatic withdrawal (and the one you initiated) was addressed at yourself?

The Bitcoin was trying to loop itself into your own freebitco.in account? And then when you tried to withdraw the same transaction was trying to get executed, but this time it didn't need the email-confirmation (you enabled 2FA) and so the transaction actually was made from your freebitco.in account into... your freebitco.in account?
But the bitcoin was never actually credited to your freebitco.in account wallet? (And in fact after it was scooped up by bc1qtf9n...hehu30 and is now sitting pretty in 15JxHSFBGTQLK3Ygdgzrz2dsHx9TNeyt3i)

If that is so, this seems way more like an bug/honest mistake from someone automatically/manually placing the 500$ into your wallet using the bitcoin blockchain but then the system fucked up and didn't credit you anything. (Do they always credit these type of winnings on-chain?? Anybody knows?) It is also weird that apparently the fees were being paid by you (you were given 0.00823099 (500$) but then only 0.00819167 were trying to be moved, which would mean a fee of 0.00003932, a fee in line with the instant withdraw option)

Of course TheQuinn or whoever is responsible should take a look, actually tally up the money and make it show in your account.

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I might be playing detective a bit too much but does anyone else recognizes (form the various posts relating to this issue) the other addresses that are bundled in the transaction at fault that then ended up in 15JxHSFBGTQLK3Ygdgzrz2dsHx9TNeyt3i?