People need to realize something. When you apply for summer seminar, the academy knows absolutely NOTHING about you. Any info they have, e.g. GPA, PSAT, etc. is all "SELF REPORTED". In other words, it doesn't mean anything. None of it's official. And they don't know anything about you personally. Who you're related to; if you're the class president; your classes being taken; etc. NOTHING.
Most of the selection is based on trying to get as many kids spread out from all over the country. They also look at kids who probably have little knowledge of the academy. E.g. inner city kid in Baltimore, farm kid in Ohio. They usually get some attendees from every state. I think 10-20 applied from my state when my son applied for SS. He was chosen. He already knew he wanted it. But, it's only 2 hours from our house and it started 2 days after boy's state and 3 days before summer football camp; so the timing was perfect.
But other than that, don't read into summer seminar. It means nothing if you get accepted; (Except for giving you a chance to see the academy if you aren't 100% sold on applying). It also means NOTHING if you don't get accepted. It has no bearing on your application or appointment. And the fact that you can put on your MOC nomination application that you APPLIED for summer seminar, means about as much as if you actually attended. People need to stop worrying about getting accepted to summer seminar. If someone wrote that there is a conflict between attending summer seminar that they got accepted for, and going to Summer Camp, family vacation, or ANY other unique opportunity that they may not get again........ I'd tell them ALL to skip Summer Seminar at the academy and go to any of the other things. CAVEAT: This all ASSUMES that you already know you WANT to apply and ATTEND the air force academy. If you aren't sure, then THAT IS WHAT THE SUMMER SEMINAR IS FOR!!! It's not for the person who is 100% positive they want to attend the academy. You don't get any brownie points on your application.