Sounds good in general. let's hope this model works because
there is no going back. But then again the fact that this is a limited time offer should contain the "damage" if it turns out to not work out well.
It makes sense... Give the core program away for free (many more will try it out), but have in-app payments for the shiny things. Many mobile apps make a lot of money this way so I guess it could work.
The thing I hope this doesn't turn into... I hate how Amplitube has so many presets that don't actually work because you first need to buy some extra stuff (the dreaded "Preset Warning" dialog that pops up). So it becomes hard to use and it's an endless in-your-face promotion all the time. There has to be a better way to separate the functional parts from the promotional stuff.
For instance, I'd like to be able to completely turn off all stuff that I don't own so that I can work with what I actually have right now. Then if I really want to see what options I have for a certain type of add-on, I can choose to then search for useful stuff.
Ideally, there should be an option to "Show Only My Stuff" in the plugin menus etc. But also an option to "Show Stuff I Can Buy". Once that option is selected, you can see plugins etc that can be paid for (highlighted in a different color in the menus), and hopefully has a demo version to first try it out.