I am not sure what you are trying to prove by repeatedly suggesting "illegal" activity from a community member sharing his very legal and self-exploiting work for free? That's rather rude.
Of course the wall data comes from the the installed module. I can also export wall and light data from what I created myself as JSON file, which then can be imported by others. As long as we are using the same PDF map file with same ratio and grid setting it will fit, even regardless of image resolution.
This is what a prepared Starfinder map looks like without the map image background. Anyone can import this, import the PDF map image as background and start playing. Last time I checked wall data was not subject to licensing and Paizo doesn't even provide their own VTT wall data. Instead that one guy prepares the walls and then includes them in the installed module. Nothing shady or even surprising about that.
https://cdn.discordapp.com/attachmen...ER_unknown.png
I shared that data without the license protected background image and anyone can import it and just add the image from their own PDF themselves. It's no rocket science, just simple JSON text data.