To understand why people risk downloading a decade-old game, you have to understand the context.
FIFA 16 was released in September 2015. While modern FIFA titles (now called EA Sports FC) focus heavily on Ultimate Team microtransactions, FIFA 16 was the swan song for a simpler era. fifa 16 steamunlocked
Key features that drive the demand for FIFA 16 today: To understand why people risk downloading a decade-old
Because EA holds no financial interest in selling you this old title (they want you buying FC 26 packs instead), the legitimate supply has dried up. Hence, the search for "fifa 16 steamunlocked." Because EA holds no financial interest in selling
Consider that FIFA 16 is old. For the same amount of effort, you can play EA Sports FC 24 or FC 25, which often go on sale for $10 during Steam sales. The gameplay is different, but the career mode has evolved (for better or worse).
Since the game is delisted, you cannot buy it from EA directly. However, third-party key resellers still have stock.