Ahh... I was thinking maybe there was some sinister manipulation available in an auction draft. Say, for example, everyone gets in thinking the financial obligation isn $50, but then someone with a bigger available budget just outbids everyone for the best lineup and essentially buys the title. A version of "big stack" poker. At which point, the $50 doesn't become the buy-in, some much higher TBD number in effect is.
I've never done an auction draft either.