How could openness coexist with adversarial SOE? Genuine question -- I think it's possible, but how?

For example, "Optimizers" currently have to guess at what Google is doing, but if the system was open source, they would know exactly.

For another example, modern cryptography actually benefits from openness. Is there a similar possibility for Search?

I have no clue really but I'd like to see what the results would be like if the presence of anything that makes a site money would count negatively towards it's ranking. Any eCommerce site unless the search is something like "where to buy...". Completely disqualify any site with ad network and tracking scripts. I'd also like to see "text/plain" given the highest ranking. There's not much incentive to game the system if you can't make money off it.