It looks like you have gotten into a very nice list of schools. Congratulations to you! I am a PSU alum and my husband is a Wisconsin alum.
My daughter was accepted to PSU in December, and since then, has received a few emails as well as snail mail letters. She has received numerous invitations via email for accepted students days. And a letter specific to the College of Science and opportunities there for her. She is not a scholarship recipient and hasn’t applied for anything special beyond just getting in.
She has applied to a wide range of schools, some much smaller than Penn State. There is variation in how they all do it. Some have better admissions departments than others. I feel that although it’s easy to say the admissions department reflects the school, the fact is that once you are there, you will never see them again. So, make your decision based on finances, quality of the major, opportunities, location, etc. I would not rank admissions as very important in the grand scheme of things. Good luck with your decision!