+1 for no subscription , there's nothing worse than "rental" of software.
Image-Line - the makers of Flstudio have the same "lifetime free updates" model, and offer regular updates and public betas.
For existing users there are always new plug-ins/sample packs etc that expand on the existing package, but whatever you purchase, be it the program or the add-ons, are all updated for free if a newer version is out. :)
I think just like the music industry needs to catch up with things, so too do a lot of software companies, and Scirra are doing it right - good communication with userbase and a very competitive licencing system - don't change a thing guys!