I think they're basically gone now, but one of the games that I really liked back in the early days was @steemsports.

I'm not much of a sports fan, but I liked what they were doing for technology reasons, because it had the potential to grow into something like a new form of prediction market that could be used to make predictions about many topics (basically anything that can be asked as yes/no, win/lose, over/under, before/after etc....). I really think it aligns well with Steemit's "Proof of Brain" concept. Unfortunately, many of the power-brokers at the time thought differently, and they downvoted steemsports off the blockchain.

Last fall, I expanded on their ideas, however, in Philadelphia Eagles vs. Seattle Seahawks - Crowd-source prediction effort. The piece that I'm missing is enough stake to draw participation. This is something you (or any large stakeholder) could probably do without much effort or need for additional resources.

Here's the concept:

1. Create a post asking one or more yes/no questions that will be answered within about a week. Accept author rewards in the top-level post, only.
2. Create comments as replies to the post that correspond with each answer.
3. Set 100% of author rewards in those comments to @null or to the SPS (to avoid conflict of interest/self-voting - IIRC, this is one piece that Steemsports did not do, which may be why they were downvoted away.)
4. Let people vote on comments until the answer becomes known.
5. When the answer becomes known, large stakeholder upvotes the correct answer and downvotes the incorrect answer, in order to distribute curation rewards to the correct voters. (I think this is another piece that steemsports didn't include.)

Maybe this could all be done in the context of a Steem community that's dedicated to making predictions, or as one of your weekly challenges (i.e. "Vote here, then go write a post telling us why you voted the way you did").

Something like this method could be used/studied in order to obtain crowdsourced predictions of things like numbers of coronavirus cases, results from sporting events or elections, stock or cryptocurrency prices, and of course many other topics.

Again, you can see an example of how it would work (minus being operated by someone with a large stake) in Philadelphia Eagles vs. Seattle Seahawks - Crowd-source prediction effort.