Ok, that I haven't considered. Old unsold cat toys should be repackaged as cat toys!
The new packaging could say "Remember these stupid things? Well cats still LOVE them! Watch your cat lose their fucking mind! It's hilarious seeing their little fur brains try to comprehend these simple toys!"
I'd buy a spinner toy like that. Planking however was ALWAYS stupid, and everyone who did it should feel shame.
I did not buy any, but got one as a gift. Was embarrassed to use it in public, but genuinely enjoyed. All because since earlier than I can remember, I require keeping my hands busy with something.