I doubt a roadmap would be considered any sort of promise or contract, but let's say it was for the sake of argument. Here are the key phrases:
@steemit...will be gradually divested of its holdings in an effort to increase promotion and development of the platform...Several methods will be employed, including and not limited to...
The term "not limited to" means they could spend the funds any way they like as long as it can be argued it's for the "promotion and development of the platform," but of course the fork is preventing them from spending the funds at all, and thus they are unable to fulfill this promise because of the fork, right? Do you have any direct quotes from Ned or a link to a video?