It’s a pretty good billion dollar idea, I think you’ll do well. In fact I bet you’ll make money hand over fist, for years. You could hire all the best engineers and crush the competition. At that point you control the algorithm that everyone bases their websites on, so if you were to accidentally deploy a series of changes that incentivized low quality contentless websites… it wouldn’t matter at all; not your problem. Now that the quality of results is poor, but people still need their queries answered, why don’t you provide them the answers yourself? You could keep all the precious ad revenue that you previously lost when people clicked on those pesky search results.