Don't blame spectrocoin for whoever got your account enrolling it in their signature campaign.
I would like to be a part of this campaign.
Username : erk
Number of posts: 2590
Rank : Sr. Member
Bitcoin Address : 1EtUPGLEqsx7rEM4oc8i5AsyV8EHkvaMgN
Thanks in advance
Perhaps the other users whose avatars were changed might also have old passwords?
In which case a hacker is on the forums today using the passwords gathered from the 2015 hack you mentioned.
The hashes of all passwords leaked, which is why everyone was adviced to update their password.