That’s pretty common. While I agree it’s not ideal for users, having credits that never expire is a headache for businesses. They’d effectively owe you compute forever, which complicates accounting. It also makes pricing changes harder, since people could keep using credits they bought at much lower prices. And, of course, if credits expire before they’re used, the company ends up keeping the money without having to provide the service. At least OpenAI shows you the expiration of your credits pretty easily...