What we have to understand, though, is how these services are a platform of their own, and has no affiliation with bitcoin. This mean, they could setup their own rules in their own platform which may include flagging your payment. Just something to bear in mind as we're also transacting with a third party.
If we're talking about Bitcoin on its own, yeah, no countries are censored. Cross-border payments in its entirety, am i right?

Yep, centralized services can do whatevs, and we should be always vigilant about that.
Even though BTC itself is the same, the platform in question may not be so pleasant to go around.