Ive seen alot of games like da hood put squid game related things in their thumbnail even though their game is completely different and the squid game stuff is an add-on sort off.
Would this be a good idea? And does it actually work with good results if anyone has any evidence?
No, it could attract more players, however, they will instantly leave your game if they dislike it or if they find that the game is completely different from what they saw in the thumbnail. This could lead to a decrease in stats and analytics for your game, which may cause the discovery algorithm to stop promoting it.