My kid took psat (preparatory SAT exam) and she had to register with College Board (SAT admins). Now she’s getting tons of spam from all kinds of schools, both email and US post. They say they got the address from College Board. :(
This is the domain I work in, and while I empathize that getting spam sucks (digital and physical), in this case I think you can likely leverage it.
Every student should have a set of safety colleges. My guess is that among the detritus, there are some colleges that might fit the bill. Finding a set of reasonable safety colleges is a good thing. [Heads up, your child absolutely needs a safety college both as a fallback and as a bargaining chip]
Secondly, and more importantly, some (but not all) colleges can be bargained with using offers from these colleges. Some colleges will respond with counter offers if you you can show them a better offer even from a college you are not all that interested in.
My recommendation is to look through the junk and make sure you have colleges of interest in three buckets "safety", "comfort", and "reach". If they are sending you junk mail then they are already interested in you. Select a few and see if it can work to your advantage.
The company I work for deal exclusively in this area and our negotiation tools and strategies save candidates $5000 a year ON AVERAGE.
On the other hand, the UC Berkeley sticker price (just tuition and fees) is more than $38k a year should you happen to be from someplace other than CA. They reject 83% of their applicants. This is a great college, with a high price and high selectivity. We help students optimize their chances of admission and aid packages.