@ 4ev - There is nothing rule breaking on those threads, or that requires moderator action.
Yes it is preferred that a thread author use the bump button to bump his or her thread, rather than making a bump post, as that makes it much easier to find the actual content in a thread without having to weed through all the bump posts. However,
there is no rule requiring that the bump button be used
in place of a bump post, if that is the author's preference. The main concern with bumping is that it not be excessive.
The limit of four active threads per author in a single forum is a Forum Specific Rule in the MarketPlace Forums, and does not apply to other forums.