If you make money from EU users and are US based you need to be GDPR compliant or they will target you through payment processors and ad networks.
If you don't make money from EU users and don't want to be GDPR compliant you should probably just shut them off if you ever want to operate in the EU in the future
If you don't make money from EU users and don't want to be GDPR compliant you should probably just shut them off if you ever want to operate in the EU in the future