People with content will still want to maximize their money. You'll get all the same bullshit dark patterns on sites supported by microtransactions as you will ad supported. Stories will be split up into multiple individual pages, each requiring a microtransaction. Even getting past a landing page will require multiple click throughs each with another transaction. There will also be nothing preventing sites from bait and switch schemes where the link exposed to crawlers doesn't contain the expected content.

Without extensive support for micro-refunds and micro-customer service and micro-consumer protections, microtransactions on the web will most likely lead to more abusive bullshit. Automated integrations with browsers will be exploited.