I don't think your arguments accurately cover the OP's argument at all. The key distinction is literally the first sentence: "Social media businesses should not charge* for APIs."
If you have a community [whatever] service that would not be a business. If you have a blog, that's could potentially be a very business-adjacent, but I'd argue it doesn't cover the "social media" qualification, so that also doesn't apply.
If you run a business and much of your content is user-generated (because it's a social media site), the OP is arguing that API access should be free/at cost.
If you have a community [whatever] service that would not be a business. If you have a blog, that's could potentially be a very business-adjacent, but I'd argue it doesn't cover the "social media" qualification, so that also doesn't apply.
If you run a business and much of your content is user-generated (because it's a social media site), the OP is arguing that API access should be free/at cost.