I was wondering that too. I know at least some exchanges (maybe even all the major ones?) use temporary addresses like that. I wonder when they started doing that. There's the huge spike in "mixer" activity from March this year onward, but that's also when Ethereum gained a lot of value. Maybe it's just a lot more trading started happening on the exchanges?
They have as long as I can remember, but the volume has skyrocketed over the past year along with more exchanges.
I don't understand how the author could group all temporary addresses, see the top inputs/outputs as all exchanges, and then claim some nefarious mixer was responsible.
