Some people trying to make a quick buck, I guess.
I found many similar items on eBay and a few on Amazon.
I myself find CDs of shotcut physically on cyber cafe’s because shotcut was published on a newspaper a year ago in India, people thought to sell it to get high profits. There’s a limit to what Dan Dennedy can do, he can’t just stop other people impersonating him, he also has to practice his air rifles (saw his recent post on Instagram).
Anyway, forget that usb, because that’s not real or published by Dan Dennedy, it might contain virus or so.
When you open up Shotcut, then go to Help → About Shotcut.