Aside from the other income channels mentioned by others, licenses for Grayjay and FUTO Voice Input.

Louis Rossmann is an employee there so I would expect that organization to have very strong staying power, especially considering the founder of that organization funded Rossmann’s R2R lobbying very early on (I no longer believe that is the case though: a dedicated charity was set up for that IIRC, which has recieved very generous donations)