I'd say Revelation Online, but why didn't many players support it? XD Did the top votes come from the official support from both developers of MU Legend and Pantheon: Rise of the Fallen?
I prefer Black Desert Online. I don't think it's a pay to win game. There is much fun in game and what's more, I think the community is very friendly, not like LOL with full of angry players everywhere.
I don't think if the devs announce how their money is spent and then the players would be more respectful to them. No matter what they do, rants would always have some bad opinions towards them. It's quite normal I think.