@ YURY - The main concern with bumping is that it not be excessive.
Bumps are only to be used to keep a thread near the front pages of a Forum. Bumping a thread that is already on Page 1 is not necessary and is considered excessive and spam.
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.
While bump posts may be used to bump a thread, if that is how the author wishes it to be done, they should not be made more frequently than the use of the bump button would allow, which is once every 10 minutes. More frequently than that is also considered excessive.