I have used them with a rotary (and still occasionally do) if you count the forced rotation mode of a Dynabrade Dual Action Head as being truly rotary. Really, its action is exactly like a rotary buffer with its buffing pad being placed off-center 3/8" (thus creating a 3/4" diameter stroke).
As for the Velcro® loop material used on the microfiber discs, it is truly Velcro® brand. The recommended backing plates use Velcro® brand hook material, and that material is a perfect match to the loop material used on the discs.
The Mirka backing plates I cut to size for use with the discs feature a hook with a similar profile, but each hook is skinnier, and look to be made of nylon (the material is shiny under magnification) as opposed to polyester. May be the reason the discs are hard to remove comparatively after use (the hooks bend or tighten with heat).
