FREE?!? What’s the catch?
Well… they might leak a little. Or a lot. 
See video
https://photos.app.goo.gl/jfbwsWSCvQ1hGiCC7
I wouldn’t run them tubeless, but maybe somebody wants them to run them tubed, or has some off-label usage for tires. Just a shot in the dark before they go to a bike-shop recycling program.