Engineering internships pay nicely. Any job that does not pay is a joke.
I never figured out the idea of an unpaid internship. I started out at about twice minimum wage for a defense contractor while I was in college. Some of it may have been dull skut work which no one else wanted to do (oh, tape boy! Make a dozen copies of this and send it out to the project distribution list), but quite a bit of it was interesting, important work.
But the same work on an unpaid basis? Nope, I'll take the job down the street.