Most of the LEO that I accumulate daily come from the upvotes on my comments. I seldom curate because my Voting Power is busted (way below 70%) and I'm still struggling to refill it to stay above 80%.
Often the same happens to me too. I upvoted many posts and many comments in the previous few days. Recently I slowed down a little bit with casting upvotes to let my voting power recharge. My current voting power is 79.34% ($0.06).