Who is null@ does anyone here know? Thanks

Hello Readers

I'm pretty new here and have posted a few blogs, I am really enjoying steemit but need to learn so much more about this place.

I wanted to promote one of my blogs so I clicked the promote button on my blog and it endded up tipping someone called https://steemit.com/@null

The page that I wanted promoting has not been promoted and if you look at the null profile it says they joined in 1970?

Here is a screenshot

Has anyone got any idea? Thanks any info would be cool.