Thread bumping scene is alive and kicking but I kinda gave up on reporting those as forum staff is not willing to do anything about it even if whole thread is filled with junk and useless one-liners. Altcoin section is a total mess anyway, and no spam reporting can make it any better so I focused my efforts on other parts of forum like Bitcoin Discussion, which is also kind of mess and filled with signature spam.
as far as I can see the same accounts were active in the other threads you specified. I assume the report yielded results or are recognized as alt accounts by a previously banned user.