For larger companies with offices in the EU (especially the ones headquartered there for tax purposes), they obviously have no choice to comply. But what about a small startup, with its only domicile and employees in the US?
What exactly could the EU do to punish a startup in that case? Unless they have some enforceability treaty with the US, I don’t see how they have any legal ground to extract fines for arbitrary laws defined in their jurisdiction. The worst they could do is ask EU ISPs and/or payment networks to block the offending sites, right?