Interlingue
When the magazine Cosmoglotta was based in Vienna, the users of the language had enough money for the first time. This was thanks to two people: Hans Hörbiger, also from Vienna, and G.A. Moore, from London. The world economy was in a bad state, but with the help of people like Hörbiger and Moore, Cosmoglotta was able to do well and gained readers. But Hörbiger and Moore both died in 1931, so this period did not last long. After this Cosmoglotta had to find money from other places: subscriptions, books, magazines, and so on.