[regularfry]

Perhaps you missed this passage on a first read-through:

    What would happen if we lost SfY? I have no idea. As I’ve explained 
    before, we have tried other communication apps and didn’t find any 
    that were a good match for Maya.  Interestingly, we also carefully 
    considered purchasing a communication device from PRC, and met with 
    one of their representatives in November, nine weeks before a post 
    on my Facebook wall introduced me to SfY (and seven weeks before it 
    even existed in the iTunes store).  We examined PRC’s devices and 
    were disappointed to see that they weren’t a good fit for Maya.  
    For us, this wasn’t an issue of an expensive device versus a 
    “cheap” app.  This was an issue of an ineffective device (for Maya) 
    versus an app that she understood and embraced immediately.  The 
    only app, the only system, that she immediately adopted as her own 
    way of communicating.