Okay, so, my main confusion --
Route 1: me, you and tng all donate $10 to hubski via bitcoin or paypal. hubski gets $30.
Route 2 (the current thing): me, you and tng all choose to donate $10 by buying into this currency circulation game. hubski gets nothing immediately. Now assume we're the only three users on hubski, and we all have our "percentage donated to hubski (as opposed to donated to the commenter)" setting at less than 100 percent to hubski. Thus, some part of the $30 will never go to hubski, no matter how many times we comment. Right?
Maybe I'm wrong, but if all of the above is true, this is essentially a pointless tax on donating. (Unless enough people's settings are on "100 percent $$ to hubski" ... in which case why not just donate normally.)