I said I'd review the options a while back and was able to do it today. Basically, I've seen some corporate stores using the free option and we actually do get a fair amount of search traffic to Ubercart.org for people looking for "free shopping cart software." I hope that's not just someone spoofing us.
So, what I've done is left that in there but added in a few lightweight options (and switched it to radios so you can preview the choices). Feel free to keep it random, choose the smallest one, hide it or remove it to your heart's content. I probably won't review this again unless it's to improve something that's there.