The CC BY-SA license allows commercial use so I wouldn't be able to guarantee if someone sold it you would get anything. The way I view it is the BY-SA license allows anyone to sell it commercially so the amount of competition in the marketplace is maximized driving the price it could be sold competitively as low as possible. Maybe if your puzzle becomes a fad you could get some fame status as the creator and maybe some interview and book deals.
If the ghost of Escher shows up threatening legal action I think you should talk to a lawyer about a countersueance.👻
Ill choose fame over sitting in a bunker on a bunch of coin anytime .
Fame and fortune ,.. where only fame has change of getting immortal .
Fortune is secondary to fame , if ones lucky , fortune will follow fame .
Spreading fame won't bring fortune , spreading fortune brings fame .
Sharing is caring , do your thing .
ill won't forget to mention you when i have a smoke with Rogan .,.. ;-)