unreasonably annoy, particularly with spam, any other user (cf. Section 7 of the German Unfair Competition Act - UWG),</li> <li>use without authorisation any contents protected by law (e.g. by copyright, trademark, patent, utility patent, or design patent laws), or advertise, promote, offer or distribute any goods or services protected by law, or</li> <li>use or promote any commercial practices considered unfair competition, including progressive customer acquisition practices (such as chain distribution systems, multilevel selling or pyramid sales)</li> </ul> </li> <li>(d) to refrain from engaging in any of the following annoying activities, even if they do not constitute a breach of any applicable laws:<ul> <li>Sending chain letters</li> <li>Performing, advertising and promoting any form of structural distribution measures (such as multi-level marketing or multi-level network marketing) and</li> <li>