I do not know the answer but having read the description in your link, I do not really see the point of "vector tiles". The whole point of a vector map is that you can have a large area - preferably a whole country - covered in a single map. If you have to break it up to tiles anyway then you may as well have them in a raster form. Perhaps the only advantage of "vector tiles" is that you may not need them stored for different zoom levels - provided they indeed work that way. The description does not make that clear.