But how does it actually work? Don't you have to give me the posting key for Hive account@robotev so I can vote on its behalf, or something like that?

Or does the bot just automatically vote for whatever its curators vote for? If that's the case, then I feel I should warn you that in addition to manually curating posts, I am trying the services of the excellent https://steemvoter.com site built by Hive account@marcgodard . This site allows me to automatically vote for a hand-picked selection of authors whose content I particularly value, or who I want to make an extra effort to help out. I'm careful not to let Steem Voter suck up too much of my voting power so I have plenty left for manual curation, but nonetheless if you want Hive account@robotev to be 100% manually curated then I'm probably not the best person to vote-follow around.