Oh no please stop the "greedy" and" nobody is gonna pay" lamentations. This is SO typical of todays everything-must-be-free behaviour.
Developing software is a hard and skilled work, but making it ready for end-users is even harder. Properly finishing, testing, documenting, packaging and supporting an app is NO FUN at all. You want to get a proper app? Pay a little something for it. You paid hundreds of $ for the hardware and dozens for $ for the services. Why not pay a few $ for a premium app? 12k is perhaps a two month salary for a skilled western developer - how much time did go into Stellarium over the years?