That's where the "option" part comes in. People who aren't worried about the cost simply don't turn it on. Those of us who can't afford an extra £1000/month (o

That's where the "option" part comes in. People who aren't worried about the cost simply don't turn it on. Those of us who can't afford an extra £1000/month (or more if it's a dedicated attack) would love to be able to just turn it off when a threshold is hit. Users may lose access, but at least you don't go bankrupt in the process.