Voting is not enough. When you're in the minority, you also need to be loud about it. The hard part is not to be annoying or low-status in the process.
No, because this is not just voting. It is voting + limiting our choices to things we support ethically. I may prefer the openness of the Android stores to the iOS App Store, but if the latter offers higher quality software for whatever I seek, there seems little point in giving it up merely to make a political point.
so basically, this points out the fact that a higher quality piece of software beats out openness. And therefore, you have the reason for which the mainstream chooses the closed garden instead of the open ecosystem.
The masses aren't stupid - they in fact chooses very carefully, according to parameters that are more wide ranging that the narrow viewpoint the tech community focuses on.