Keep in mind, just blocking traffic out of the EU does not serve as GDPR compliance. EU citizens are covered by GDPR, not EU traffic. A EU citizen traveling to the US is still afforded all the protections of GDPR as they do back at home.
In practice, GDPR is binding on businesses that operate within the EU. An EU citizen in the US doing business with a US-only company is not afforded any protections under GDPR.
https://ec.europa.eu/info/law/law-topic/data-protection/refo...
I experienced this myself. EU is absolutely powerless outside their borders.