1) That isn't a statement of a value proposition. So far, really the only things people brought up are rewards & better results [which is largely subjective as you are paying for both of these things].

2) Windows is using shady tactics to push Windows 10. They are doing this due to using it as a conduit to increase Bing results [among other reasons]. They've been smacked for similar tactics before for reasonable sums. [1] [2]

3) The reason Google and later other parties funded Firefox is because the default search engine on a browser is a relatively sticky proposition as many people don't change it.

4) Desktop is more profitable than mobile which is why Google's CPC numbers are eroding. [3]

[1] http://techcrunch.com/2015/10/22/bing-is-profitable/ > However, while all that is nice, it’s the second bullet point that matters more than the first. Microsoft derived one out of every five dollars it made in search from Windows 10 devices. Windows 10 has a far smaller footprint than the larger Windows world, due in no small part to its relative age.

[2] http://www.washingtonpost.com/wp-dyn/content/article/2009/01... > The court fined Microsoft more than $600 million and ordered it to offer a version of Windows in Europe without the Media Player software and to share communications code with rivals.

[3] http://www.rimmkaufman.com/blog/google-mobile-cpc/11032011/ > We found that mobile CPCs are a median 41% lower than desktop CPCs for the same term with the same bid, copy, matchtype, network targeting and landing page. These results were quite consistent across a sample of clients with the standard deviation at 5%.