A $40 upvote or curation reward per day is possible, but it requires either heavy work or some investment. I am here from 2017 and I've never sold any of my Hive and my upvote is around $0.25. Considering 10 upvotes per day with 50% back to curators, would mean $1.25 from my own upvotes. Surely that is enough and the hope is from the other's upvotes to get up there.