When sharing links make sure the map (or 3D model) is marked as public and that you are using the public version of the URL. It has "public" in it instead of "detail" like the one you have shared.
The map is 2D and the model is the 3D version that has the links in the bottom right of the Map Detail page in the section labeled "3D Online Preview (low-resolution)"
The downloadable files are there in case you want to export the georeferenced imagery into AutoCAD or GIS software. The full resolution version of the 3D models can be viewed using free MeshLab software.