Unfortunately it's not just Google's display ad business that incentivized blogspam, but pretty much every display ad business I've ever seen. So I'm not sure w

Unfortunately it's not just Google's display ad business that incentivized blogspam, but pretty much every display ad business I've ever seen. So I'm not sure we can attribute the decline in search quality directly to this conflict of interest. It feels more to me like Google is just losing its mojo and running out of ideas, while the arms race of "SEO" continues.