Full-funding offers at Vanderbilt (Dean's Scholarships, Carpenter Scholarships, etc.) went out around Feb. 11, the Scholars' Day for students to visit who were offered named scholarships is on March 15. So if you haven't received a fully-funded offer I doubt you will, unless someone turns down an offer in the coming weeks. I don't have knowledge about how less than full offers are decided, or if they've been decided.
After a season of rejections, and perhaps after multiple seasons of rejections, at what point do you realize that maybe you aren't cut out for graduate school/academia?