Many of the Uber cars are also luxury towncars, for which fuel, upkeep and maintenance can be a large cost. Especially if you consider how much they are driven in a given year.
Because it's astroturfing. It's a small step to go from monitoring communications in real-time to directly and automatically responding to certain communications events, for example giving the appearance of interest where there is none (or the opposite, giving the appearance of disinterest).
It needn't be bots posting spam but it could be trained professionals engaged in spreading fear, uncertainty, and doubt.
Wikipedia is the encyclopedia that "anyone can edit." Although it might fly against the prevailing opinion online, I would not classify a one-word edit like this as a defacement. Whether Snowden is a dissident, traitor, or some other word (patriot?) is really a matter of opinion.