Exposure is important to promote #nostrmemes and get people to participate in the contest. But variability in reach will always unfairly advantage large accounts and will make it less fun for new nostriches. Basing the contest on reactions on a decentralized protocol doesn’t really make sense. They can be spoofed easily, and missed easily (based on the relays you’re using). Should be a panel with judges, and maybe have most zaps hold the same weight as one judge on the panel. 

This way people can repost all they want and give exposure to the contest without muddying the water. People can try and spoof reactions and zaps as much as they want but a bad meme won’t win over an entire panel of judges.