Thanks for the replies.

The Lifu, Var, and Pedros all fit into the dropout axel slots, which means they must be put in place after the wheel has been pulled and removed before the wheel is replaced, forcing the user to deal with the oily chain. I believe they are intended for a slightly different use.

The Toureze does not contact the axel slot and can be placed before removing the wheel and removed after the wheel is reinstalled. The Toureze would be usless for bike shipping, It simply is meant for temporary use while the bike stays (lays) in one place.

I am amazed that something this ingenious has apparently fallen out of favor with cyclists.