When someone forks a project, there's a chance it'll take off.
You can't convince someone else to fork something. If they had the drive to fork it, they wouldn't need convincing in the first place.
In contrast, if you don't talk about your goals then you really try to achieve them because you know at the end you will "feel good".
As you see in this blogpost it starts with the most important thing -- naming the new fork and then goes into some politics and maybe even release schedule.
Of course, the second the "Post blog" button has been pressed it's all forgotten as nobody wants to actually spend time working on this.
Congratulations on coining a new term!