Ya know, grammatically you and the other folks who have pointed this out are correct. HOWEVER, I kinda like the implications of the "typo". Paindancer, and by extension the heroes of Paragon City ARE having an effect on on change itself.
My point here is we are not JUST fighting to save City of Heroes. We are also (as heroes should) setting an example. We are showing people a better way to handle this sort of fight. Not destructive, tearing down our opponent, but gracefully acknowledging that NCsoft had what they considered valid reasons for what they did, and respectfully but firmly insisting that some better way can be found.
So, even though it was an acknowledged grammatical mistake, perhaps it was a fortuitous one. By chance, this mistake makes something of a point. "Chance, if chance you call it."