GamesIndustry.biz - Payday 2 shows how not to change a business model.
"Consider a counterfactual, if you will; a scenario where Overkill, instead of sneaking in a new business model under the cover of a misleadingly titled event, had engaged openly and honestly with their community (however small a sliver of the customer base that "community" may be) and worked through the reasoning and the plans for the introduction of new business aspects in the game. Consider a scenario where the company, in humble acknowledgement of its previous pledges (which would now be broken and should never have been made), figured out a way to make the new model work for existing players, so they felt benefits from it, not just an aggrieved sense of being gouged. It wouldn't have been smooth sailing - in-game purchase models raise some hackles regardless - but it would have been a much smoother transition than now, and the immense damage that's been done to the game's reputation and chances of future playerbase expansion could have been largely avoided."