Germany has the strongest economy in Europe. The debt compared to the GDP is half of what the US has. And I guess a lot of the money goes directly back into it’s own industry, since they are a big military supplier. They can easily afford it.
Not a package but FilleZilla is developed by Tim Kosse for over 20 years. I know that there are a lot of other FTP-Clients but FilleZilla is my favorite. Easy to use and very very stable. There is a pro version sure, but most of the time the regular one does the job. My company throws thousands of dollars a month at Adobe, Microsoft and others. But they would never even think about giving anything to Tim Kosse and others, even though I’ve probably saved days of work with tools like this.
Privacy focused people use more often Linux so the percentage of Linux users for proton services might be a bit higher. I don’t care about a calendar or mail app but I think a proton drive client for Linux would be important.