Good point, a few months ago I completely change my stumble strategy, yes I have a strategy. I use it to focus on seo and smo information. I have also ditched non seo and smo friends and also in the process of ditching A listers I thought would be cool to have as friends but do nothing on Stumble.

I'm not sure there are power users on Stumble, I think their are people who are well connected, but I don't think that one account has more juice than another. But if they have lots of friends who check their feed and then pile in and vote then yeah, that's the juice. That's the power.

If someone is all over the place with their submissions re topics, I am less inclined to notice them, but if they constantly submit on topic, quality stuff they are more on my radar.