Don't get cocky, kid.
Keep in mind, Hannibal's Italian campaign eventually failed because he couldn't get food or reinforcements. Rome wore him down and forced him to withdraw. Carthage eventually lost the wars and ceased to exist as a civilization.
In general I agree with your conclusions and the internet is certainly a powerful tool. However, I've reached the point where I'm no longer surprised by the Watchtower's ability to shrug off adverse information. I expected people to leave in droves when they changed the generation teaching in the mid-nineties. Didn't happen. They've now changed that again to an even dumber teaching that no one understands or can explain. Yet there are still millions of Witnesses in the world.
I think they are in the process of reinventing themselves. Preaching is clearly not intended to produce actual converts, the conventions are no longer designed to even remotely appeal to the public, and they are totally changing their business model. The Watchtower is trying to morph into something new, that we won't even recognize as our old religion. But the new version, I suspect, will live on.