Well, I prefer to be skeptical of any corporation, regardless if it is non-profit or not, until proven otherwise with substantial transparency on their methods of moderation and control.
There is a lack of transparency on Wikipedia. The rules are nebulous and prone to abuse by veteran users and the oligarchs aggregating on political articles.
Hold on, their moderation methods are as transparent as could possibly be. Every article has a dedicated page where every decision has a reason and more often than not an overwhelming amount of discussion. Their overall policy is similarly debated publicly.
Is it overwhelming? Oh yes. Tough to change? Probably also yes without dedication and sound reasoning. But opaque? Certainly doesn't fail that criteria.