We seem to disagree on what unethical behavior means it seems. For instance, I don't think Groupon, Airbnb or advertising in general are unethical at all. I can understand why you have the position you do if your meter for unethical behavior is like this, but I don't think this meter will do you much good in life. Either way, we won't really get any further on this argument when we have such basic disagreements so this is where I'll stop.