If you really love reddit you won't do this, because it eats into reddit's own tipping product which means taking away revenue from reddit.
We thought about having an option in the Chrome extension that also contributed to Reddit on each tip, so something like "also tip 0.001 BTC/10%/whatever to Reddit each time I send money". The micro-transactions could be broken down like this in any arbitrary way. Just an idea at this point, but definitely doable.