Some software publishers provide customers with a link to an online license agreement which serves as the default for all customers. This is quite convenient for the publisher, but not so for the customer. The publisher can easily change the agreement without notifying its customers. Customers can carry on, carefully abiding by the old license agreement but may be breaking the law without even realizing it. The customer can then be sued for breaking the agreement by over consuming licenses.
Customers need to negotiate purchase contracts that require software publishers to provide hardcopy (or other suitable media) license agreements and advance notice of license agreement changes. Otherwise, the default license agreements will apply to the customer (see the snippet from one publisher’s website). Click the link to see the and example of a publisher that uses default online product license agreements.