IMO, it's an unnecessary update regarding other issues that DBOG have, like the quests. I get the idea that the team had, but it will have a major impact in the economy of the game, also the F2P ones will suffer depending on the drop rate of those unbind coins.
Also, such a change in game without asking the opinion of the players was a wrong move. If you guys asked before, I'm 100% sure that: a) a better solution to the problem would be implemented; b) the players wouldn't be at this rage, and would notice the care of DBOG with them.