International agreements on jurisdiction, especially if they are to have exclusive validity, generally have the purpose of protecting the party benefiting from the agreement from the often very considerable costs of a legal dispute in a foreign country.
Unfortunately, however, it is not uncommon for the other contracting party to suddenly no longer want to know about the jurisdiction agreement in the event of a dispute. The background to such a dishonest approach is – obviously – not least the potential for blackmail associated with such an approach. This is because the party that finds itself – in breach of the jurisdiction agreement – exposed to a foreign lawsuit is regularly forced to take action abroad through lawyers in order to avoid legal disadvantages. This in turn is often very expensive, with the USA being the most prominent example.