Regarding the new Oct 13 - Oct 14 updates:
hmmm...finance related niche here and seeing all my SERPS -30. I seem to remember this happening almost the exact same time last year.
Last year, if memory serves was a push of all e-commerce sites between now and Black Friday.
My site is monetized by Adsense and one affiliate link on an inner page. Mostly informational and almost completely hand-coded (yes I like it), totally clean from broken links, with almost no link-outs.