You have to look a little closer. From the first item on your link it does say "by Shopsmith". If you look on the right side of the page under the buy now button it says "Ships from and sold by BeautieDream". That is not SS. Remember the SS brand abrasive products are made by ALI Industries and branded as Shopsmith.
From their website...
"Ali Industries also launched a complete line of professional quality premium abrasive products to the DIY market under the Shopsmith® banner."
These products are marked under the Gator name.
The SS branded abrasives are sold all over the place like Lowe's. They should be as they are OUTSTANDING. But, it is another example of things that SS has sold over the years with the SS name that they did/do not make.
When we see SS products sold on Amazon from SS in Dayton then we might know SS has a presence on Amazon. When we do, all the listings will look the same and will definitely say they are from SS.