What are the edits like this, and what do they mean? - Divisions by zero

I’ve just opened the OSM site on my PC to have a look at the history in my area, and I’ve seen this apparently massive edit. It covers most of the US, a lot of Canada, and a significant chunk of Europe and the UK. wheelmap_visitor says that ‘This is a proxy user for all wheelchair tag changes happening on Wheelmap by anonymous users of the website and app Wheelmap.org [http://Wheelmap.org].’ so does this mean that if someone has made edits to areas inside the rectangle at some point recently that they all get included in this edit?