You're clearly trying to push some pro-tipping agenda, but if all you can cite is a single Uber driver blog (who of course wants you to tip) that's pretty flimsy evidence.

The vast majority of Uber riders do not tip. [1] There's not an expectation that you do (even the driver blog you cited admits that). I don't really know why you're trying to create this perception that it's expected, but it certainly isn't.

[1] http://www.cnet.com/news/to-tip-or-not-to-tip-drivers-that-i...