I’ve been searching for a good google maps alternative for a while now and I think I’ve found it in mapy.com, the same one you mention! So far I’m liking it and making small contributions here and there with photos of the local storefronts of the shops that I visit

edit: Does anyone know if I add a business to mapy.com, does it automatically get added to OSM?

Beautiful map, thanks for sharing! It looks like a scan of a folded paper map. Any idea where I could find one?