Forum:Commercial?

Hello. I am confused on how to determine whether a wiki is commercial or not. I've heard that some wiki's are noncommercial (e.g. Wookieepedia) and others are commercial (e.g. Lyrics Wiki). Is there a way to tell if your wiki is or is not a commercial site? -- D . S . E . R . ( DSER ) 17:12, May 28, 2011 (UTC)