But network effects and marketing are irrelevant for products that can't be used in your country because they violate local laws. If some Google product can't legally be used in the EU, then it has zero network effects there and Google wouldn't waste money marketing it there.

Also, the competing EU-based service might be strong competitors to the ones in the U.S., among people like me who are privacy conscious. I don't use Google services, but I'd be happy to consider using GDPR-compliant services based in Europe.