Fundamental business models on the internet

I contend that there are four fundamental business models on the internet.

1. One-shot purchases
2. Subscriptions: Or something-as-a-service
3. Ads
4. Tax: The tax model focuses on earning money when your customer earns money Rohan R at alearningaday.com

How to make money on the internet? Rohan explains very nicely in this post. I found the first part “I. The 4 core business models” especially enlightening.

Here’s Rohan’s sketch. Where in this sketch do I want to be? What can you build and sell to be there? Can I start with a subscription model and then move over to the tax model? Or can various parts of my product leverage each section?