I absolutely know its a scam but, how does this work?

Opened my Coinbase Wallet to check something and found out I have half a BiLlIOn dollars.

Some old shitcoin suddenly came back to life…

Am I understanding that if I did try and swap/trade this, if be paying someone some fees? Or, if I read this correctly, I'd be trying to pay half a billion in fees?

I get that its a scam. Just a new one to me. How did someone get the dead coin value to suddenly appear to be of value again?

I won't be clicking on the button to try and sell/swap/trade. Was just a curiosity and maybe a warning for others.