What are we (or am I) missing here?
a. Could they be using a typing software that automatically adds two spaces after each full stop ?
b. Could this be a sign that they all belong to the same team that invented bitcoin ? I doubt it, since I can't be the one to point that out. I am too silly.
Two spaces is not strong evidence.
It indicates that Satoshi either trained on a physical type-writer prior to digital processing, where double-spacing was common. But we could already guess that Satoshi isn't young any more.
https://www.cultofpedagogy.com/two-spaces-after-period/.
I personally think that his double-spaces means that he resided in the American West, where double spaces held on culturally for longer than in other parts of the world, and which matches several of his other behaviors.