If you don't have (and won't acquire/process) any personal data on individual in Europe, then you're not bound by GDPR.
But if you have any personal data on at least one physical person in Europe, then you're bound to the GDPR, whatever you write in your TOS. That's what Instapaper didn't really understand (same for US's newspaper that may have subscriptions from people in Europe). GDPR is above your TOS. Your only way out would be to delete identifiable datas bound to european people.
BTW: not all datas are "personal". For example: there's no problem for advertising... only for TARGETING (based on informations bound to an individual). If the target is "big enough" not to be able to single out a specific person, then everything is fine. You can display ads following gender, age, country, city... because these categories are wide enough. You can assign a "profile-id" to anybody... but not a "user-id" (this would be "personal")
If you don't have (and won't acquire/process) any personal data on individual in Europe, then you're not bound by GDPR.
But if you have any personal data on at least one physical person in Europe, then you're bound to the GDPR, whatever you write in your TOS. That's what Instapaper didn't really understand (same for US's newspaper that may have subscriptions from people in Europe). GDPR is above your TOS. Your only way out would be to delete identifiable datas bound to european people.
BTW: not all datas are "personal". For example: there's no problem for advertising... only for TARGETING (based on informations bound to an individual). If the target is "big enough" not to be able to single out a specific person, then everything is fine. You can display ads following gender, age, country, city... because these categories are wide enough. You can assign a "profile-id" to anybody... but not a "user-id" (this would be "personal")