Question on Bumping in the Guild Recruitment

So, I'm running a contest for my guild which involves bumping our thread in the Guild Recruitment Forum. I just want to make sure there's no rules over there against.. say... overzealous bumping. I think I remember seeing something in the Tech Support forums asking people not to bump a thread on the first page, but I wasn't able to find anything like that in the Guild Recruitment forum sticky, and it didn't look like that was a punishable offense in the general forum CoC.

I just want to cover my guild's bases so no one gets a forum ban because of this.