Quote from the history article linked above<p><i>&quot;The following month, a principal competitor of WordPress, named Movable Type, announced a radical change to their pricing structure, thereby adding significant fuel to the WordPress fire by driving thousands of Moveable Type customers their way.&quot;</i><p>Yup: I had to move several project sites I was running for my then employer as we had no actual budget (it was a college) and I worked out it would cost several hundreds of pounds a year under the original commercial license. I recollect that six apart later modified their cost structure, but too late we were off.