Hey mate. As you stated you have just started your research. So I will not be too judgemental on your comments about spacex, I'll rather give you some pointers to do your own research.
Spacex is looking at broad band, SAS is narrowband. SAS is about connecting new people where there is no other forms of communication other than expensive satellite phones. SAS is also about IOT and m2m. +-50,000,000,000.00 devices. SAS is moving into a market where the limitation is the lack of providers not a lack of customers or devices. First mover advantage. Low cost.
The SAS forum is well supported and if you take time to read through the forum then you will find tonnes of info. Look for comments made by
@craigvn ,
@OzJ ,
@princetui ,
@PeterKing.
And welcome