Hmm, having a look at the post history, the majority of it was in the German boards, but when the forum came back online, I noticed a sudden change on the posts of this user: it appears that his English is not bad at all. Also, the account became active again since its last post in 2012, and looking through the history of this forum, there are several compromises on the forum's security causing to have some down time. Could the account be compromised too? I don't know.
I also just looked into his earlier posts.
Seems like he was a German Scammer already, but didn't receive a SCAMMER tag and also no negative ratings (probably the trust system wasn't active at the time).
He was associated with the site
http://mybitcointrade.com/ which is defunct now and may have been re-registered by someone else in between. That would make it likely that his account was simply hijacked by the new owner of the domain (he'll receive his emails now as well).
I guess it's conclusive: hacked account of a former scammer.
Negative trust incoming.
It defiantly did not have it's password reset via email in the last 30 days. If you search the
security log for "- " (a dash followed by two spaces) then you will only find one entry of the password being changed (that requires the knowledge of the previous password).
This account is either a hacked account (by the person who hacked the forum) or is actually the person who ran the referenced scam. His dox was even posted
here