I have seen many a democratic initiative ruined by trolls, bot accounts, duplicate accounts, and assholes. The best way to ensure that democracy doesn't spiral into Haiti is to allow only financial contributors of $5 or more to vote (once the boss man has his contributions system up and running). You want to help build this community? OK, then put your money where your mouth is. To be clear, it should still be one vote per person, whether you donate $5 or $500.
Nay. You shouldn't be able to buy your way to influencing policy.
If there really is a concern with bot accounts or duplicate accounts, then those should be tackled via different ways. Also, what is with the assumption that "assholes" both don't have money and also shouldn't be allowed to vote?