Same here. After closing my account I was still receiving reminders of invites I got. I had to use a web form to ask them to stop sending me emails. It was quite disturbing to see how hard they tried to cling on my data.
I also used that bug for the three levels. At that time I was more concerned in catching up (I started late) and the thought of it being an unintentional bug never crossed my mind. Though hours later I thought it was a bit strange that all three levels had to be solved in a similar way.
Actually it's much better: it takes much less space, can be configured to ignore certain file types and can disappear after the downloads are finished.
If you look at ClouldFlare's report, Google Analytics misses at least 30% of the pageviews, so there's a good chunk of unaccounted visitors. You are more like a third/quarter the size.