title: Question regarding the ExtJS License
body: <p>Let's say I create a CMS that uses ExtJS.  </p>
  
  <p>I want to avoid the license fee, so I open-source the CMS on github.</p>
  
  <p>Now let's imagine that I make your friend Dave a website that uses my CMS.  I spend three hundred hours designing a logo and layout.  Can I charge a fee for this, and would I be obliged to open-source Dave's website too or is it enough to just open-source the CMS?</p>
  
  <p>I find this LPGL license a little confusing.  Say hi to Dave for me.</p>