I have been hit on 2 websites of mine. Google penalized some of my pages and it guessed right because I purchased some backlink included in articles for those pages. I did not purchase many backlinks. Let's say 7 backlinks for website 1 and 4 backlinks for website 2.
There is a page of mine where I have purchased a backlink with anchor red widget, because I was 11 and wanted the top. Now if I search for red widget I am 26, but that page still rank first for blue widget. So I think Google hit specific pages with specific words. Due to the fact that I purchased a few backlinks I could try to escape from such update. What do you think is the best strategy? Erase the page I purchased with the red widget backlink or pointing the same link against a competitor?