DPoS, I appreciate that you are genuinely concerned about this, but variance happens.

If you have any evidence beyond the de facto luck of the pool, I'd personally be delighted to see it, but claiming to be the only guy who can see the conspiracy while the math nerds politely nod and smile...

I say this without malice, but it reminds me of the scores of (to a person, bad) poker players I've met over the years who talk about how dealers screw them, how winners are just lucky, how they usually win when they sit in their lucky seat, how they never win with pocket aces, and a gillion other things that all come down to the reality that variance happens.

They don't understand it, and so the game must be rigged.