Most of my fonts are DEMO. They all come with a nice License & FAQ file, which explains what that is and how you can use my fonts. In short: yes, you can download them and use them for YOURSELF for free. If you want to use my fonts commercially, you can purchase a license (and receive the full, embeddable font). Please visit my site: hanodedfonts.com for info.
If you want to get a tattoo with one of my fonts: please feel free to do so. No donation is required. If you use my fonts for your tattoo shop, buy it.