Licensing question

May 18, 2010 at 5:56 PM
I admit it, I really don't understand all the different open source license requirements, so here is my question: If I customize, and incorporate some vertical-market specific functionality, and then let people use that website that I host for them (and charge a fee), am I required to release the customized package? I think the key is I am not "distributing" the source code, or even the binary - just making it available for a fee to use, but I want to make sure first.