No, I do not. I did work for several in the past and only one of those would I say operated "with conscience". They were overcome - overwhelmed by more "sinister" competition (of some reknown, wildly successful still). You need to see their operations as algorithms, and put numbers to actions. Ethical behavior often has a cost - and the counter unethical behavior can yield great gains - exposure may have a risk of a cost, but that may be mitigated with proxy agents, or marketing and relationship management. Someone has this all worked out, monte carloed through the gamut, including things that you might consider to be greatly evil.