International students' chances of becoming Questbridge finalist?

My parents want me to go back to our country for college because the tuition is just too expensive here. I was nominated for the Posse scholarship, so I will see how that goes but I was wondering if doing ED through Questbridge is worth it? My GPA is high, but I go to a big school and a lot of people have GPAs higher than mine. My SAT score isn’t that high either (1850) and honestly, I’m not that good at writing essays. Do citizens and permanent residents have a higher chance of becoming finalists and being matched?

I’m having a hard time thinking of a single reason why wouldn’t they.

From Questbridge:

Important considerations for students who are not U.S. Citizens or Permanent Residents, but are attending high school in the United States: Only some of our partner colleges will consider non-U.S. Citizens or Permanent Residents for admission and full scholarships through the College Match. Most of our partner colleges use federal and state funds to finance a portion of the scholarships, and these funds are only available for U.S. Citizens and Permanent Residents.