thoughtfulThere are thousands of members of the current and past Worldcons who are eligible to nominate for this year's Hugo Awards and who never cast a ballot. Conversely, there are many -- an unquantifiable figure -- people who would like to nominate but who cannot afford $50 to join a convention in Australia or something like that. If you're a voter who has no use for his/her ballot, why not partner up with someone who has the desire but no money? If you're a would-be nominator who can't afford the membership (and it's too late to join before nominating anyway), why not look for a "Hugo buddy" among people who have memberships but won't use them.
Now before y'all start yelling "Fraud! Ballot Box Stuffing!" let me point out that the effect of what I'm suggesting is that person A is transferring his/her membership to person B, who then uses that membership's Hugo voting rights and then transfers the membership back to person A. None of those transactions is illegal, and all are consistent with current practice.
Yes, I know, I'm a dangerous lunatic who wants to Destroy Us All. But I don't see any real harm in this. For that matter, I expect it's already going on, quietly and under the radar of those people who want voting to be Pure And Unsullied