Example of one exchange, out of countless others:
Source (Idiot like you @Tiger fist, isn't even capable of basic search like this)
We automatically generate a new address for you after every transaction you make or when funds are moved between your wallet and our storage system. This is done to protect your privacy, so a third-party cannot view all other transactions associated with your account simply by using a blockchain explorer.
All addresses that have been generated for your account will remain associated with your account forever. They are safe to re-use to receive future payments, but for the prior stated reasons, we recommend using a unique address for all transactions. You can view your complete list of crypto addresses at any time here.
You are confusing yourself, buddy. Didn't you say that you traded with SmokerFace? So, why are you even looking at the exchanges and what they do? Yes, we do know that exchanges create unique addresses for each user. But how did you and SmokerFace end up sending money to the same wallet? Also, once an exchange receives deposits from users, they later send it to their hot wallet which receives hundreds of Bitcoins every day, as Tiger Fist pointed out, none of those wallets received more than two or three transactions in a week. So, how are you trying to convince the community that it is not your address but an exchange on that? Does not make sense at all.
By replying in your self-moderated thread, you are inviting people to engage in this thread so you can delete it if you do not like the reply. Good move.