Emails From Universities?

I recently took my PSAT and ever since we received our scores, I’ve been getting a lot of email from colleges and universities. Among the best are Rice, ivy league University of Pennsylvannia, University of Chicago, Boston University and Northwestern. The day the PSAT scores were given, I was absent so I still haven’t found out what they are but I’m getting a lot of emails and was especially surprised to get on from the ivy league Upenn and from Rice as well. Does this mean I probably did good or do all students who checked the box to receive emails get them? Or do certain universities have like a certain score you must get or certain grades for them to send you an email?
I’m really curious :3 please help