Technical Anyone Have Any Experience With These Tire Screw/Plugs?

Yep, exactly. Today “corporate” tire shops such as Walmart and Firestone are not allowed to repair tires in any way. They will only sell you a new tire, due to liability. Plus that puts more money in their pockets obviously.

 

Don't tell anyone, but I've even put tubes in tires because there was a slight leak through the sidewall...

 

When I was younger and working at a gas station in the later 90s, we still sold radial tubes for just an occasion.