@furion I have another thoughts on your result. High profitability in curation probably means that a curator voted for popular posts, and then he/she can maximize the curation rewards. Meanwhile the low profitability can have two cases. 1) low profitability with wide range of votes (in my data, low max and stdev). 2) low profitability with small range of votes (high max and stdev). The first case implies that a curator is a hidden gem finder. He/she wants to find new and good authors. The second case implies that the curator is a sub-community supporter. The curator's vote is loyal to small group of people in his/her community. I think smooth is this case. But I am not sure what kind of community he is supporting now.