https://www.indiehackers.com/podcast/034-mike-carson-of-park... claims 125k/month
Apart from the minecraft founder I'm most amazed by http://www.businessinsider.com/how-markus-frind-bootstrapped... For years he ran the website alone on a single (big) server, claimed working on it an hour or two per day and earning $10k/day in Adsense. http://www.workhappy.net/2009/01/remember-markus-frind-the-a...