So for users Google+ is most relevant in social? Not even one link from Facebook or Twitter? Just like Google Local is best for the users when showing 100% Google links. Please do not insult people's intelligence. Google is doing this for a few reasons and plastering more ads is the main one. With Google+ a lote users get to stay on Google+ due to placement not go to our sites.
Just because some criticize Apple and some are now criticizing Google doesn't mean that Google is doing the right thing, considering Apple's success. Apple works perfectly for 99+% of users and APPL never touches that, Google is adding crap and hiding what the users want with dozens of ads (Please don't go into "they're relevant." Yeah, so relevant to your CFO that Google feels the need to show me a full page of them and I need to turn my laptop screen to see what are ads and what is content.) Now imagine if Apple added 2-3 extra tasks to their most basic functions.
Tracking is another beast. Do not poke the government or users in the eye or they will make you cry. A tiny change in the law and there goes half of your revenue. Once they determine you're "evil," everything you do is under scrutiny and that includes ads, tracking, anti-trust and everything. And next time you advertise illegal abortion drugs through Adwords they will just jail your execs and cripple the company.