I am wondering if it is worth spending $299 just for reading the code alone. Or may be someone could even build Rails Teaching course on top of it.
It would be interesting if they offered a $99 option that gave you access to the source code with no active license but did let you run it locally so you can see how it works in private.
For someone who is more interested in the code than the app itself I'd do it at $99 but probably not $299.
I know they are saying they are going all in with PWAs, but native apps really are nice on mobile and it would be interesting to see an API/App story to go along with this.