Did you speak with your Legal team?
I did ask Marketo for clarity and our rep got some questions to Marketo Legal. Not sure I got the level of clarity I desired, so it would really be up to your Legal Counsel on specific compliance operations, such as using Marketo's US or EU data centers, Workspaces/LPs, etc.
Hi Dan! As Josh mentioned, I think a review of the GDPR and the impact it has on your company would be a good idea. It would be great to get more information on it from Marketo. If I come across anymore information that might be helpful to guide discussions with a legal team or actions that can be taken on behalf of an organization to ensure compliance, I reply back to this thread.