I mean it's not hard if you have a VPN. The way I do it is
>Copy the poal URL
>Open a new incognito tab
>Change my location
>Vote
>Close incognito tab
>Open a new incognito tab
>Change my location
>Vote
Repeat until I get bored. Though I haven't bothered fucking with poal results in ages I just gave 8 votes to Poster like right now though lol