“Users take advantage of the complete feature-set, including licensing terms, when they use a product. If multiple authors are free, then users create them to solve a myriad of problems. If multiple weblogs are free, they use that ability to make up for deficiencies elsewhere. If you change that, they feel betrayed as much as if you removed a key feature.”
I couldn’t agree more. Excellent analysis. Also, his remarks on user ethics (MT is written in Perl, so any restriction could be easily removed) are to the point.