Possible Motivation for nontargets

I recently received an offer for a summer internship in investment banking and I thought I would describe how my recruiting season went.
First a little background on myself. I go to a definite non-target school. Think pac 10 school not in California. The only recruiting from any investment bank that we get is one back office job. I am double major in finance and economics. I have a 3.65 GPA. I am graduating in 4.5 years, not because I didn't get a ft offer (I didn't apply for FT all), but because of the additional credits I needed for my second major. Last summer I interned at a joke of a i-bank in NY, it was really a retail brokerage. It was not paid, but it was something to put on my resume. Before that I worked at a small no name PWM here at school.

Now onto the more interesting section, how I applied to banks. This has been said before, but networking is the key. I attempted to find every alumni I could, even though they were slim and far between. I also tried to find every contact I had through my family (think friend of friend of my dad). The other way I went about applying was by basically cold calling senior level people at banks. I didn't actually call, was a little more creative than that. I would rather not go into detail on how I did this. It worked astonishingly well. I had global heads of divisions passing my resume along to HR. These were people that I had never spoken to before, but recognized the initiative I took to reach out to them. I know for a fact that this got my a first round interview at two top BBs.

I received 2 first round interviews and one informational interview that turned into an interview to my surprise. Out of the 3, I landed two final round interviews. I received one offer and the other I believe I was waitlisted. The one I was waitlisted for, I told them I needed a response very soon because my other offer was going to expire. They called me back right after that and turned me down. So, I may have actually had another offer if I decided to wait it out.

I realize this was pretty long so I'll write a little synopsis.
-Get work experience anyway you can. My one last summer, I found on Craigslist!!!
-Make sure your resume shows a logical progression.
-Contact every single alumni and personal network you can. Most will be willing to help you out.
-Know what you want. I only applied to investment banking jobs, no S&T or operations. I think it showed in my interviews that I really wanted the job.
-All the places I got interviews at, I didn't apply online for. You need to be creative and show you really want the job.
-Know your shit when you get into the interviews.
Thats all I can think of for now. Please don't pm me with questions. I will try to answer your questions here.