when you post on little biggy or vote or list an item you are adding content to little biggy. buying on the other hand does not happen here but rather at a payment processor. apart from anonymized reputation there is no permanent content and thus no owner to assign the data to.
I am for the idea but I have to vote against the initiative, it is terminally biased. Here is the problem: the "eliminate" option can not be fairly represented. People that don't want to register are presumably not registered to begin with. If they do register a throw away account for the initiative it will be a noob account with little weight per vote. I can't think of any way to mitigate this problem in the public format here. With biggyscript you could do a few things I suggest this approach or changing the structure of the initiative.