Earlier quoted context omitted.
I can recommend this article: http://swampland.time.com/2013/01/31/we-the-people/ It argues that the reason for petitions to exist is the possibility to open a dialog to the people who are concerned about certain topics (because the petition website gets your email adress), and that in the time of fractioning news consumption it is a useful way to keep communicating, whatever that means. edit: Ok, why the heck do the…
Maybe I'm just cynical (okay, I'm probably just cynical), but that looks like a slightly more positive spin on essentially the same idea: a whole lot of 'communicating' and no action. > edit: Ok, why the heck do they call their page Swampland? Probably because it's about politics, and according to popular myth, DC was built on a swamp.
If you recognize that people who want change have been writing individually to the White House to get it for generations, redirecting some of that mostly-invisible-to-others mechanism of feedback (which, because of the volume, is pretty much guaranteed to generally produce generic responses and little action) to a mechanism where requests and the responses can be highly visible and serve as vehicle for groups to raise interest and propel a conversation that then extends beyond the WH petition forum, it has some value.
If you look at the response from the WH as the end of the process that the petition starts, sure, its not particularly useful. But that's, I think, misunderstanding the point rather badly.