There is in the moment no period defined nor directly planned. A developer has been found and there is some basic mechanism going to be implemented.
https://passionbull.github.io/jjm-list/

Here is the site, where you can find some more data for JJM holders. It is showing the rate, which will be the base for a possible dividend.

Meanwhile, you should use the JJM tag in your posts, as you will be eligible for an upvote from the virus707 account. It is in the moment still manual and the upvoting is not accurate, but the programming for a bot is also planned. :)

If you have any further questions, I will be the main communication channel for non Korean holders :).