Interesting. That's also been my experience so it's good to hear confirmation. It seems the be consistent with the posts I've read on how "rank" is calculated.

I wonder what the penalty is for "re-posting", especially because timing seems to be key. You post at 8:30AM and get very few looks from your target audience, and then post again at 10AM and coincidentally reach a large amount of your target audience.

I wonder where the line is drawn between "spam" and "persistence"...