Earlier quoted context omitted.
It costs $40 for a 2-year-old game because the market is bearing $40 for a 2-year-old game. If anything, it's a testament to how good a job they've done making the game.
The most recent Battlefield released at $80. Arc Raiders released at $40 with a $20 deluxe edition upgrade. I think $40 for a game like Helldivers 2 is totally fair. It's a fun game, worth at least 4 to 8 hours of playtime.
Is that supposed to be praise?