I really like the thought you've put into this and I will participate in this experiment. [edit] Sent 1 SBD now.
expanding on a thought... Having worked in retail I know how much tips mean to servers. Based on my current reputation and average earnings per post I would definitely tailor my voting and tipping to what I could afford. I might even consider the content I'm reading, how much I like them and their community interaction, and tip more...or not at all.