We took action on vivint.com because it was spamming with low-quality or spam articles like
- https://web.archive.org/web/20130919184930/http://anadesign.... for "Alburquerque NM home security system"
- http://www.womenspk.com/5-ideas-for-keeping-your-elderly-rel...
- http://www.frugalful.com/2013/12/five-surprising-ways-to-sav...
- http://doyoulovewhereyoulive.com/archives/top-10-benefits-of...
- http://arch.itect.us/2013/01/17/top-10-benefits-of-automatin...
and a bunch more links, not to mention 25,000+ links from a site with a paid relationship where the links should have been nofollowed.
When we took webspam action, we alerted Vivint via a notice in Webmaster Tools about unnatural links to their site. And when Vivint had done sufficient work to clean up the spammy links, we granted their reconsideration request. This had nothing whatsoever to do with Nest. The webspam team caught Vivint spamming. We held them (along with many other sites using the same spammy guest post network) accountable until they cleaned the spam up. That's all.