&quot;Give me more money or I leave&quot; is not blackmail. That is called an &quot;ultimatum&quot;.<p>Blackmail is defined as a demand for money in exchange for <i>not</i> revealing compromising or injurious information.<p>&quot;Give me more money or I will publish these naked photos of you&quot; is blackmail.<p>One of those is illegal. The other one isn&#x27;t.