Lots of recruitment questions for all you SEC schools sorority girls!

[SECmom629]

My daughter recently participated in fall recruitment at an SEC that I'll leave unnamed, and was very dissappointed when she was dropped 3rd round from a sorority to which was my legacy, and ended up quitting the process altogether. She rushed as a sophomore, has a very high GPA, and is very beautiful (I'm not just saying that because she is my daughter, she has been told that all her life). I alson did all I could for her, by submitting a legacy introduction form, and recommendation letter. I know being a legacy/having recommendations for a sorority doesn't guarantee a bid, especially at a school where recruitment is so competitive, but I can't help but wonder, what went wrong?
Also, she has signed up for continuous open bidding since she is still very interested in becoming a member of this sorority. Can anyone tell me how the COB process works? How many girls receive bids after Bid Day? Is it harder as a sophomore? Furthermore, is it a bad idea to contact the VP of recruitment for that chapter? Or hinting at leaving a large donation upon her graduation? I would never want to do anything to bring her negative attention! Thanks!

Concerned Mother