They'll probably use this to blackmail senators and representatives to go along with whatever plans they want. They don't care what an average Joe says or emails, they care about what people who Joe elected did so that they could control him/her.
You are better off signing a petition on the whitehouse.gov
All others don't really go anywhere, you might as well sign petitions on your personal blog otherwise where no one will ever read it...
And why he lied? Because he doesn't care. The few owners of this country, don't care for everyone else as long as they have ways to control them. Now they are trying to squash the NSA stuff by not talking about it at all, maybe a distraction in Syria will help.