There are no coinjoin transactions in the wallet in question. If there were then the wallet would show as being in MtGox and others, although after a certain point then wallet explorer will exclude the transactions from belonging together (either way it will not show a CJ address as part of a small wallet).

If you look at the above timeline then you will see that poeEDgar signed a message from his address which shows the addresses are not part of some kind of service or website.

Careful consideration were given to make sure no sold accounts (that actually changed ownership, and not simply passing through an escrow in an attempt to farm trust) were tagged.