I think it's been several years since I've actually visited duckduckgo.com. Modern browsers make it really easy to set DDG to your default search engine.
Yeah but I often use other computers. I often thought about having a shorter name under elinks for instance.
People often want to try it for a while before to set it as default. Same happened to me when I changed my default browser. All being said I think a rebranding would make it more competitive.