I completely understand that many of you prefer to stitch with DMC, either because it is easier to purchase or because it is much more economical for you. I am always available to create conversions for you for any of my designs, past or present. When there is space on the chart cover to include the conversion with the pattern, I often do so, but many times there simply isn't room without adding an additional page. In order to save on cost, I have opted to put in a note saying that a conversion is available upon request. I know that this requires an extra step for you to reach out and ask, but this is what I have found to work best, all things considered.
Many of my customers automatically ask for a DMC conversion to be included with their chart (when purchased directly from me). I am almost always prepared to do so immediately (brand new charts might take an extra day or two as I am busy processing new orders).
I hope that helps you to better understand why I do things the way I do!