For those who want to check the posting pattern, it is on page 54 (as of posting).
I checked it and there seems to be a change in how it is posting and after 5 years, there should be at least a coming back statement or something. That's just how I view it if you are an active member of the forum or something. Idk. Probably hacked or sold?
I'm not sure if this can be proven or not though.
I guess this account is most likely sold to another member. You can't just post something that you don't know about and it's quite lengthy to be exact, so most probably this new user is actually a good poster in the forum as well. Well, that's just also my speculation, once investigated by the forum admin, that would be the time that we will know the truth.
But whatever it is, as long as the change is for the better, then that won't have any problem.