

No harm in messaging them just to say thank you.
If you’ve just stepped out of uni into an internship you still have a lot to go, but getting through college, uni and into an internship is an achievement in itself. They won’t be disappointed, they will probably be proud that the work they did encouraged you to stay in education for as long as you did!
How about capping the amount they can earn above their lowest paid employee? For them to rise they have to take everyone with them