I think that you're taking the analogy too far. The main point seems to be that the paywall is this 'line in the sand' that keeps moving as soon as the 'enemy' crosses it.
In newspaper terms it's like having a paywall but allowing the full text of the story to appear via Google's cache.
Wikipedia says this is a myth:
> It is a myth however that the Maginot Line ended at the Belgian border and was easy to circumvent.[2] The fortifications were connected to the Belgian fortification system, of which the strongest point was Fort Eben-Emael.
[2] Mosier, J. The Blitzkrieg Myth: How Hitler and the Allies Misread the Strategic Realities of World War II, HarperCollins, 2004, pp. 2, 38.