A large amount of companies would drop CF like a brick. Nearly every company operating in Germany that uses CF would drop it, very few would be willing to say goodbye to money to keep CF. Any CTO affected who wouldn't drop them should be fired. A vendor should not be removing your ability to operate in markets.

It would seriously hit CF's stock price as it would be a massive sign that there is a massive risk of other countries blocking it. And some competitor would pick up all the customers fleeing. CF is not the only game in town, switching to a competitor or just dropping it completely is often rather easy.

Any CEO running CF or similar company willing to call the bluff of a country on something like this should be booted by the board. It would have a massive effect on CF long term while it would have a reasonably short term effect to Germany and German consumers. For example, every sale call would have people asking if their primary markets are at the risk of being blocked. That's a major objection to add.

Make no mistake, being blocked in the 4th largest economy in the world is extremely bad for any company.