Yea the site looks a bit disorganized and crackpotty. Perhaps because its translated from french?

You can find videos of them on youtube actually making these stone blocks though. The method works. Based on how long it took a small team to make a couple on their first attempt, it could be a hundred or even thousand times more efficient than carving them out and transporting them.

So if I were going to build a large limestone pyramid that's how I would do it.