How Did I Get On Fish Farming Spam Lists?

I can understand a lot of things. Not horrible many, but a lot. I can understand financial spam comments on here, medical, even flowers. I can understand all of that. It makes sense. This one throws me though:

Lipkin thinks that he may be capable to immunize the tilapia towards the brand new virus by injecting them with a protein found on its surface, thereby coaching their immune programs to recognize the invader before it invades.

How the heck is there fish farming spam comments out there and how the heck did I get targeted for it?