I'm by far not well versed enough i n legal matters to give a conclusive answer on this, but as I understand it, the trademark thing mostly becomes an issue when you want to advertise locally and especially for enterprise SaaS where you pretty much need a sales team on the ground and maybe even a local business entity for the other party to sign with.

I don't think that it is very likely that a country will try to block its citizens from subscribing on some website. At least I have never heard it being done over trademark issues.