Should I include this in my college application?

I am a registered writer for this content/freelance writing website iWriter
It’s basically this website where small companies or individuals pay people to write essays about their business or promote their products.
I was wondering, would it be beneficial if I included this in my college resume?

I can’t think of any reason why not. May not make a huge difference, but can’t hurt.

Anyone else have more input?

Absolutely include it.

I wouldn’t use the term “write essays” to prevent any misunderstandings! How about “write copy”?

Sure, sounds like a part-time job to me.