It doesn't look like there is, but they seem to be actively trying to create value... and it wouldn't surprise me if their income model improves over time.

They begin each dividend report with: "All liquid Hive from this post will be used to buy and burn LOLZ. Token earnings will be staked to increase curation value." And this RECENT UPDATE announces the raising of token holding requirements for tipping the $LOLZ token, among other things, so the thought and intention is there.

And I like the emphasis they place on growing the account overall and using their Hive and various token powers to actively curate and engage. It's nice to see.

Not a great answer, I know. It all doesn't equal sustainability, but there is some value here. (And the jokes aren't bad either... I have fun participating.) 🙂