It is not. I've been using DuckDuckGo before switching to them, for me privacy is a big deal. When I first saw ecosia, I thought it was similar to DDG in terms of privacy(Probably because they had pro-privacy phrases).

I know it's not a problem for most, especially if they are using search engines like Bing or Google. And I believe it's better to use ecosia than using say, Bing or Google.

There isn't other than the planet benefits