How competitive are the positions as a Rater - US?

Applied for the Rater - US position a few days ago hoping to make some extra income. I filled out the application fully and agreed to all the terms.

However, I just received notice this morning that my application was denied, with no other info why. I recently graduated from a well-known college, have a decent amount of work experience, and a 3.5+ GPA. Is this a competitive position that I overestimated my chances of getting? Or are there things they were looking for in my resume that I was lacking in, such as work experience or extracurriculars specifically regarding social media.

Would greatly appreciate any info!