"is_prediction_market": true,
That looks all right.
As for the people using it .. you need to actively market your PM to people .. you can use a link to get them to enter it directly:
https://bitshares.openledger.info/#/market/ETHWAR_BTS (for instance)
I see such a problem that the link forces new visitor to go through registration first.
He can click "EXCHANGE" button but only smart people will be able to see what exactly the link is about.
Yes, that is a problem. But that is a problem for the entire Bitshares platform (most of crypto too). It is mostly just a test so I can figure it out as there are so few explanations of what the options are when creating a smartcoin or UIA or prediction market. I just kinda guessed.
When I first opened my bitshares account in OL back in January I saw a very clear page where UIA were posted. It had prediction market coins for the price of Oil, the US election and other random things. I no longer see that page with this new set up, does it still exist?
One issues I see with the topic of my first prediction market assets is that there is already a good way to "bet" on ETH vs ETC, just buy them. Why would they need my asset? Well it is a learning curve and next time I will pick a better topic.