Actually, this is not the first time this has happened.
When Byron decided that he did not have the time to be part of SRP anymore, he also requested that his account be closed when he stepped down. I suppose that was his way of affirming the decision to move on.

Robin is not the first to resign, and also not the first to request his account closed. After his request we mailed back and forth a couple of times, and decided that this announcement would be the best way to avoid backroom speculation.