I think the biggest reason why we don't have a lot of HBD products on the network is advertising. Most of the HBD projects die or are still there just no one knows about it. Over the years I have seen many HBD projects come up but I don't see those projects still alive or they are hidden. But you are correct we focus to much on hive and not enough on HDB.
That is true for most closed games. I don't know the best practices to start a game. So it's hard to comment on.