Outside of having actual proof of suspension, I'd view 80% of these as troll results. finding that users with suspended accounts in an hour is unlikely.
So either 2% of all HN readers have had their AdSense account banned, or the poll results are a bit noisy :)
(Obviously this is extremely rough math, but allowing for a huge error margin, 0.5% of HN readers would still seem too high, at least to me)
On saying that, AdSense is an enormous program
Actually, HN has grown exponentially since 2011. You'll have to extrapolate this chart: https://news.ycombinator.com/item?id=5253773
Also, the traffic fluctuates depending on which part of the day you measure. There are comparatively few people here during 3AM - 7AM in the US.