There's no voting currently. Anyone can add any token, including any coin, by using the Issue Asset selector from account's top right control menu. Freshly created tokens are marked "uncertified" by default and only accessible through clicking the "Show uncertified" tag. Only assets issued or controlled by Heat Ledger Ltd can currently become certified. We guarantee redemption and proper operation of the certified assets, which we can't do for other assets issued by 3rd parties on the decentralized HEAT blockchain.