I think the motivation is primarily uptake but there's going to be some interesting side effects. For example there are a number of people very keen to see this on the Raspberry Pi which will require an arm Linux engine as currently we only have x86. As the core goal of the Raspberry Pi is programming education I think LiveCode will fit nicely between Scratch and Python. The language is very much like the scratch language without having to drag blocks around.
I am starting to wonder if pitching the kickstarter as being for open source was a mistake. People are wondering why that costs anything. It would have possibly been better to just say... we're going open source but we want funding to make some massive changes to the platform. Here's an example of one of the core goals of the project http://blog.runrev.com/blog/bid/265511/Open-Language which I think is huge. Besides being able to extend the language with DSLs for your data model or library which is big on it's own there's two other VERY interesting possibilities:
- create functionally equivalent syntax in another natural language (e.g. French like syntax rather than english) and the engine could display whichever syntax the reader preferred.