It means no use of Visa or American Express bank cards, which are US companies.

I think SWIFT transactions are under US control.

No use of Apple, Google, Amazon, AirBnB, Uber, or other US-based services.

Eg, "Canadian judge Kimberly Prost is unable to use credit cards or access everyday services in what she calls an attack on the independence of the judiciary " - https://www.irishtimes.com/world/us/2025/12/12/its-surreal-u...