I am one of the people with a few BB auctions here and there. I have a clear explanation why I do this.
I am just entering the brandables so I know I have a lot to learn. I like the brandbucket principle as a passive way of potential sales. List a few names and get a possible sale.
The dotster and netfirms .com sales was my chance to enter. My plan is to get a bunch accepted, sell off a few on NP which will cover both the cheap reg fees and the money to publish the names. I keep the ones I like best and publish these with the acquired publishing credits. This way, I have a beginners portfolio for "free", paid by flipping profits. Since reg fee was around 3 dollars and I can sell the rejects in the bargain thread, it is quite likely that this is possible for me.
The good thing is that I can then wait around 8 months to see if I get BB activity. If not, I can always sell the names on NP again.
The NP value is a nice backup for people like me just testing the waters for brandables, as I myself would have no idea how to sell brandables myself.
For me, domaining is part time and a hobby which gives me a small amount of extra funds every month. Therefore, I do not want to invest 500 dollars to wait 8 months or loger for a possible 2000 return. I play the faster game. I wont get the best price, but I am happy with that. This tactic is a way for me to sit and wait without risk and concentrate on my geo domains.
Hope this makes sense.