The EU is a much larger market than the UK. If you are an international company that cloned their database, not offering your product in the UK because you coul

The EU is a much larger market than the UK. If you are an international company that cloned their database, not offering your product in the UK because you could be sued is a loss. However, not being able to offer your product in the EU is a much bigger loss. So, such companies are much more likely to comply with the license if OpenStreetMap is protected by EU laws than by UK laws.