Great tips, Achim!
Only 100 manual curators on Hivw? Hmm, seems kind of low. Or you are referring to manual curators who vote on posts that haven't been voted on before (or not enough to attract at least a little bit of attention, and outside our personal feed)?
It's an estimate but I don't think that there much more than that and it's a pitty because they fullfill one of the most important jobs on hive.