Read this-
Non-publicity of data
For now, I am intentionally not making it public who bumped each topic, since that way you can't prove that you bumped anything, and this may prevent people from selling their bumps as easily. I don't particularly object to making the approximate bump scores or bump powers public, but I didn't do this yet.
I agree with theymos's thought. Also, I think anyone can bump a thread. So, there's no way you can read other people's mind if they are intentionally bumping a thread or it's a coincidence. People like their supported coin's ANN to be at the top.
Unless I misunderstand the question?
I think he is talking about the new bumping algorithm on different boards.