Way back in the past, yes. Steam stopped refunding, as people pretended to have gotten scammed to duplicate Items.

The reason you got "hacked" (which isn't possible, unless you leaked your data yourself) is because you're using that website. All 3rd party websites are "use at own risk" especially all those trading and gambling ones. If you log in there using your Steam credentials, they have your Steamlogin and can scam you whenever they want.

Valve does not refund stolen items.

Did you hand your API key over at any time? Did you hand your API key to tradeit.gg at any time?

#triplefacepalm

That is the opposite of “hacked”.

引用自 Kyo Shin：

Has anyone ever received a refund for items that were hacked?

I once deposited my items on {SCAM SITE} to get balance, but my API key was leaked (or something like that, I’m not really sure). My account automatically canceled the offer from {SCAM SITE} and created a new offer that sent all my items straight to the hacker’s account. I lost about 300 dollars back in 2017, and that pile of items would probably be worth around 1000 dollars now.

Your items weren't Trade Protected in 2017.

引用自 ReBoot：

Did you hand your API key over at any time? Did you hand your API key to tradeit.gg at any time?

I’ve never shared anything related to my Steam account except my trade offer link. I think I logged into a fake site and they got my information that way.

引用自 Kyo Shin：

引用自 ReBoot：

Did you hand your API key over at any time? Did you hand your API key to tradeit.gg at any time?

I’ve never shared anything related to my Steam account except my trade offer link. I think I logged into a fake site and they got my information that way.

Logging into the fake site was how they phished you.

引用自 Silicon Vampire：

#triplefacepalm

That is the opposite of “hacked”.

Having your information stolen through the internet is considered being hacked.

引用自 Kyo Shin：

引用自 ReBoot：

Did you hand your API key over at any time? Did you hand your API key to tradeit.gg at any time?

I’ve never shared anything related to my Steam account except my trade offer link. I think I logged into a fake site and they got my information that way.

I think you're right, this is indeed the most likely attack vector. That specific kind of scam is known as phishing.

引用自 Kyo Shin：

引用自 Silicon Vampire：

#triplefacepalm

That is the opposite of “hacked”.

Having your information stolen through the internet is considered being hacked.

It is called hijacked.

引用自 Kyo Shin：

引用自 Silicon Vampire：

#triplefacepalm

That is the opposite of “hacked”.

Having your information stolen through the internet is considered being hacked.

Handing your house keys to a thief and then getting your house robbed is not breaking and entering.

You giving that 3rd party website your login information you gave them the keys to enter your account. You allowed them in by giving them your keys so you wasn't hacked you allowed them in.