A few examples come to mind, are they similar? 1. BMW accidentally enabled the heated seats in your car, then later deactivates it? So you enjoyed a bonus for

A few examples come to mind, are they similar? 1. BMW accidentally enabled the heated seats in your car, then later deactivates it? So you enjoyed a bonus for a while, seems like they're entitled to remove it. 2. Bank accidentally gives you $1,000,000. A while later they realize their mistake and ask for the money back / transfer it out of your account. My understanding is that this is exactly what would happen. What are the differences from this situation? Is it really a problem?