I think it's a clear initiative to make some thread visible bumps. For me, there is no suspicion but rather a direct accusation.
[I know having alt accounts are not a crime, but still I thought of reporting it as it looked like spam to me]
Forum rules consider it spam,
https://bitcointalk.org/index.php?topic=703657.01. No zero or low value, pointless or uninteresting posts or threads.
it's the 2nd level crime after plagiarism. You can report that thread and alts.