> Why would anybody want to buy it if it is possible to download it for
free?
download is impractical, it takes too long.
Often you want it offline, when no internet-connection is available.
Or you want to have a fixed version, not overwritten by updates.
Or you want to have it in case it stops and goes offline and is maybe no
longer available
one day.
The German version is being sold in Germany, but not the larger English
version.