You are right, i missed the point a little bit. Thought you think prices don't drop fast, but all big Sony AAAs drop to 30 bucks within very few month in Germany.I think you're missing the point. This is what I was replying to:
That post is wrong except for games which flop because the majority of games are sold digitally, and relatively speaking very few gamers are buying games from the retailers you mentioned because most people either havent even heard of them, and because Amazon is like 100 times bigger
But Besides that i think you underestimate the commonness of those search engines and especially bargain sites like MyDealz. They are much bigger than you might think. MyDealz alone has many millions of visitors each month.
Just checked Amazon.de. Horizon is even 70 Euro from Amazon itself, but it starts in the 30s from Marketplace vendors. Even if people are not clever enough to use google or the mentioned sites for better prices, they at least have eyes and can see them on Amazon.
Also digital sales are not the majority, physical games are becoming stronger: https://gameranx.com/updates/id/281208/article/ps5-owners-prefer-physical-games-over-digital/