Not really like you said. I'm among tipu curators and I can tell you that you don't send anything to tipu. You get some free upvotes daily. BUT how many of those upvotes and the value of them depend on your work. If you end with higher efficiency (post that you upvoted, are high value, specially after you upvoted them) you get more upvotes per day. And if your curations diversity is less than 100% (meaning that sometimes you upvote posts from same user) , well that's how much your upvote will be worth. So if your diversity is 75% your $1 upvote will be worth $0.75