is a text file with link of use

I have written article for high pr site and they ask for it in text file, I was expecting it to be formatted but they seem to just hosted the .txt file..

Is my link worth anything with out anchor or html link ?

I would say so. Bots have no problem reading a websites robots.txt file so they should have no problems finding your links. Most readers know how to copy and paste so if they wanted to visit your site, they will.