* The API access charges about 10x the price compared to the revenue per user they would expect if the users accessed reddit via web or official app.
* There was 30 days notice of the new pricing. He has many customers that pay per-year that he is going to lose money on until renewal.
* The price is too high. Compared to similar platforms that charge for API they are charging way more.
* An individual from the company called him out for having 'inefficient' code, which he took personally and mounted a good defense of his usage.
* The API is losing feature parity with the first party website/app.
* Reddit is itself building a bigger business on the backs of reddit users generating content. Many of those users use a 3rd party app. In fact, 3rd party apps were largely responsible for transitioning reddit into mobile usage. They seem to be overstepping their position in the ecosystem.