What? The definition of a valedictorian is literally "the student (singular) with the highest academic standing in the graduating class" just as the salutatorian is defined as the student (again, singular) with the second highest standing.

Some schools literally don’t give less than a B anymore, and that some would make anyone with an ‘A’ valedictorian is a real thing. According to this [https://www.campusexplorer.com/student-resources/what-is-a-v...] article I ran across, Stratford High School near Houston gave 30 students valedictorian in 2010, and I doubt that has gotten much better.

Think of it as ‘scam innovation’ - the first ones to do it get major rewards (for schools it would be acceptance at better institutions for their students), then it spreads as more people figure it out, it hurts the legit folks, then folks start adjusting for it to try to tamp down the scamming.