Well, I don't know if I would categorize curation as non-existent (even five upvotes, while low, is something), but it sounds like the bigger question is, are we waiting for Musing to curate?

I can't speak for everyone else, but in my case, I am and I'm not.

I've been trying to continue to curate as I did prior to Musing effectively shutting down upvotes thanks to the loss of their delegation from Steemit. However, my curation rewards will not get the return they were with Musing upvoting, too. So, I think I should continue to try to curate, but I'm also needing to adjust how I do that, which affects the percentage I upvote and then how often I can upvote.

Now that Musing's voting power is back to 100%, I hope they decide to return to curating soon, even without the delegation. It would be like it was before they had it.

I don't like to leave anything I upvote with less than $0.03, especially a post, comment, question or answer that isn't likely to get more, but that isn't necessarily the case where I feel more upvoting will occur. So, there is some strategy involved beyond once I've determined if I will curate something or not.

A couple of reasons why Steemhunt and other dApps might be enjoying more success with user curation than what Musing has been able to muster, especially now:

—Steemhunt, Dtube, and some other dApps have been around longer. in some cases, quite a bit longer. Steemhunt is over a year old (10-2017) and also received a large delegation back in July of last year. So, it's had more time to create a following, and it's also had an opportunity to reward users longer, since Steemhunt also curates.

Meanwhile, Musing came on board in May of last year and received a delegation back at the end of October. That means it had it for less than three months before it was revoked. While I believe we saw some sort of uptick in users over that period, it's not a whole lot of time to build an active community, especially among those who were attracted to the upvotes, and not necessarily committed to the platform. It can take time for that to happen unless a user is naturally inclined to asking questions and providing answers.

—In some ways, answers and questions can be harder to gauge what to upvote and what not to upvote, and then decide how much. There is a value factor that is rather undefined, but seems to drive what happens on the STEEM blockchain regardless. I think we instinctually upvote posts more frequently and with more Voting Power than we do comments, or for that matter, answers and questions, because we have an idea of how long each of that takes, how well they're written, what we get out of them, etc.

So, that could be coming into play, too, along Musing being a short time dApp, with a smaller following, potentially comprised of a higher percentage of newer users, who might still need to be schooled in the ways of curation, and who are content to receive a Musing upvote in and of itself.