Since official activation is no longer possible, the community has developed workarounds to bypass the server check:
For several years after discontinuation, Rovio reportedly rigged its activation servers to accept almost any input. Users found that entering simple strings like "ROVIO" or even "FULL" would successfully unlock the game. Server Shutdown (2024): bad piggies pc activation key
If you search for keys now, you’ll find sites claiming to have "Keygens" or "Cracked Activators." ⚠️ Since official activation is no longer possible, the