This is what I learned from the 2021 USC decision thread. You will most likely not be offered an interview for Presidential/Trustee scholarships from USC if you let them know in your application that you are a NMSF. Most of the rejections on that thread are high stat kids with NMSF. You are much better off holding this NMSF information from USC and you have till May 1 to let USC know after you get admitted. This way you may actually get admitted. The sad truth is there are way more NMSF applying to USC than there is USC Presidential scholarships available. You can test this out yourself if you don’t believe me. I think people will catch on that this 1/2 tuition offer is just a way USC attracts high stat students to apply and to lower USC’s admission rate. Most of the NMSF applied are rejected in the end.