Where do they say that they will give all of your data to the next customer to occupy your spot if you don't use this option?
I have looked at the UI and the API docs and it simply is not there. The scrub option says that it writes zeroes to your partition, but it says nothing about giving all your data away if you don't do that.
I simple can't blame them for delivering what they say they are going to give me, even if they could have built their infrastructure better.