To combat this problem, Google started providing all these associated services -- Finance, Reader, Blogger, etc, etc -- so that people would begin to use their Google ID as a significant component of their online identity. These services were never supposed to be profitable, they were supposed to provide a competitive "moat" for search.
If people begin to take their data out of Google services -- which is the only rational response given Google's repeated and blatant disregard toward its "customers" -- these customers might start looking toward Bing and DDG very soon. Then Google will have a problem.
Even Android could have a problem if people begin asking the question, "what happens if/when Google sunsets Play? Will I still have access to my apps?"