It looks like you are correct, @vet2be93 . From the website:
*Students eligible to receive a non-resident tuition waiver by earning at least $4,000 in competitive scholarships each academic year are not eligible for the Maroon Merit Award.
Note: If at any point you become eligible for a non-resident tuition waiver, all future payments of this scholarship will be permanently terminated. *
https://scholarships.tamu.edu/FRESHMEN/University-Scholarships#1-ScholarshipsforOut-of-StateStudents (click on Scholarships for Out-of-State Students)