Imagine you run a website. Some day, for whatever reason, Google is blacklisting you. Are you going to say "eh, no big deal, I'll just have my customers use Bing instead"?
Do you mean "Some day, for whatever reason, Google stops directing traffic to your website of people who don't know who you are, for free?"
Sounds like it's time to spend some money on advertising.
Their ability to kick a bunch of traffic towards you or refrain from doing so makes them a market-maker, but they share that with newspaper and television networks. It doesn't make them a monopoly. It's not their fault or responsibility if people don't "tune in" to the Bing channel.
Sounds like it's time for companies that can't get in Google search results to start doing ad spots about search engine choice.
- typical HN response.