If you don't have physical assets in Europe which can be seized then whether or not traveling Europeans decide to use your service is irrelevant. GDPR is not go

If you don't have physical assets in Europe which can be seized then whether or not traveling Europeans decide to use your service is irrelevant. GDPR is not going to force you to take down your service in the US or India. It's kind of like a Saudi visiting California and requesting that local gay people be stoned as per the law of their land - not going to happen.