>What's debatable is whether targeted advertising is necessary for a business to maintain that profit. The GDPR suggests it isn't.
You're right to a degree. You're right, because ad revenue from the EU is a lot lower than the US. Even if targeted ads in the EU aren't a thing, then a service that mostly gets US ad clicks and ad views will be able to handle it just fine. However, this means that EU viewers/readers will be treated as second class citizens.