With ad/search sponsored products ie. google and now canonical, the business has 2 customers. The consumer and the people they are selling ads to. And they aren't even making money off you directly, so it doesn't take much logic to work out where the balance of interests lie.
And guess what. With iOS you're the product again, as the real customers are the mobile careers.
Can you give an example?
Although I highly doubt Apple would risk the backlash by putting a malicious feature like that in without an option to turn it off.
Really? Wasn't Apple the one tracking iphone users wherever they went? [1]
I get the concern about Ubuntu sending data to amazon by default (i.e. can be disabled), I really do, but going out of the way to recommend something as proprietary as either Apple or Microsoft out of spite? This is what really bothers me about the OSS community. How about helping Mint/Fedora out and recommending them instead? I know some do, but even the OP here flaunted that an OSX recommendation seemed more viable than Ubuntu. As much as I would want not to be tracked, at least with Open Source SOFTWARE we can be more aware of it, or even have a say in it; not always so with proprietary stuff! So no, I do not believe either Windows or OSX are better than Ubuntu in this regard.
Not to mention that Canonical isn't a big company, so if they need help bootstrapping by doing some stuff with amazon for now, then so be it. I would hold off judgement on their actions until they're actually in a position of real financial power, cause right now it just seems they had to resort to such ad placement deals because the generous donations weren't cutting it. It's really not clear whether it's actually that big of a deal right now.
[1] http://www.guardian.co.uk/technology/2011/apr/20/iphone-trac...
If OS X decided to record all of your search results you'd be SOL.