Do any of you know if schools only give you fee waivers if you haven't started an application with them yet? I have received fee waivers from a number of different schools that I hadn't started applications with. Vanderbilt and NW are two that I will add to my list since I got fee waivers from them. But I am wondering if schools won't give you a fee waiver if they see that you've already started an application with them (since you're presumable applying without it).
Any thoughts? Should I delete all of my applications and see if I get any more fee waivers over the next few weeks?

And sorry if the answer to this is buried in that 62-page post about which schools have given fee waivers this cycle!
Thanks!