Yahoo and Bing aren't going to bring you the traffic that Google does, and it's because the general consensus is that they are inferior search engines.
Until someone makes a search engine that people prefer to Google's, there's no point in anything except making content that one likes to make, cares about from the enthusiasm of the writer's integrity, and publishes because they want to.
Dirty tricks and black hats get you nowhere with Google in the end, and I personally don't much care about the poor poor people that lost money due to the value of their bazillion backlinks going South.
Cry me a river.
Sorry, I'm only able to be me.
Google has to much power over this industry? That I can agree with, but the answer is still the same, until someone comes up with a superior product (search engine, in this case) - and it catches on because it's so much better, there's nothing to be done.
Being a star on Bing or Yahoo makes you a fifty cents per day earner here. No thanks! I want Google traffic.