Bumping a post if the person is still looking for work or person to fill a role. I remember being told that’s fine. But of course I don’t actually spam, which would mean doing this everyday. I wait 3-4 days before bumping and only do it 3-5 times before redoing the whole post. And only if I’m still open for work(which I imagine is often for most freelancers) or need a position filled.