I pretty much agree on most, except regarding unclarity with web platform from commercial point of view.
There is no recipe for web platforms, like there are for appstore or googleplay, but that’s down to very different nature of platforms.
Web is so much bigger and diverse, there are dozen of different kind of websites and services in web, this just shows how vast possibilities are in web.
That applies to games as well, and to monetization, someone is selling in game bonuses, someone is selling services, another advertises their agency, someone is selling services and so on. There are many ways to make money in web.
So if you look at recent huge success projects such as agar.io or slither.io, they made simple games as possible, so they are accessible to pretty much anyone capable of tapping a screen or moving a mouse. Add the fact that web platform is biggest platform than any others combined, and you are getting huge number of users, in that case ads - bring tons of money.
Then you can take wilds.io as example, and his totally different approach to monetisation and players accusation.
It is important to challenge our views of web platform, and take off any “filters” we use to look at web platform, like coming from mobile world.
Web is different from any platform out there, and shall be understood in isolation.