How can win GA with too low Contributor value?

I never said they were cheating, but that I would feel as though I had been cheated or something. Like if I made a giveaway for say 30.01, and the person had like $70 from only a bundle, and dropped to $30 before the giveaway ended, I would feel slightly cheated since the game could've gone to someone who has given away something other than just a $1-4 bundle.