I think upvoting your own posts is a personal choice that depends on where you are in the minnow-whale cycle. If you're a minnow then it obviously helps so why wouldn't you do it? However, once you start to get some serious voting power (like you do), then maybe it's not worth it so much anymore. I can definitely see your point: your posts make a bunch of money anyway so it's probably more beneficial for you to use your steem power to upvote others and help the platform grow. Like I said, I think it all depends on where you are.

Good post. Keep 'em coming.