From what I've seen it _seems_ the language's creator is not interested in corporate sponsorship. It's been some time since I was interested in Nim, so I don't have any direct references to this claim. A web search would probably provide several examples. It was one of the main reasons why I decided to focus on other languages.

AIUI, Reddit uses it for some internal tools. They would be a good backer.

this is a who comes first, chicken or egg

Nim is one of those languages that tries to be everything for everyone, trying to fill the range from python to C++

If Nim had any strategic edge anywhere, someone smart would have picked it up to build something very successful and it would have had more sponsors