Months ago I noticed it wasn't taken, so I registered it and held. I have edited the design to have a more DLive feel. So feel free to post on the subreddit. There will be flairs soon for people to post their videos. Or to post that they have posted or they have went live.
Some of the DLive team have already been made mods. You should expect some form of rules to the subreddit so look out for them in the sidebar. Including more information about the team and things they are doing.
This is really just the start of the subreddit so I can't say what will be change or what rules might come. But I'd suspect what the DLive team feels is appropriate will determined as time goes by.