when people stop buying blockland and badspot cannot run the forums anymore.
we might hop onto a new forum though.
This is pretty much how I feel things will turn out. Badspot has drastically been slowing down with Blockland and moving onto other smaller projects, so I think eventually updates will stop coming. Once the most recent update sometime down the road gets more than two years old, and people start getting tired of Blockland, I think they'll just start fizzling away. The dedicated forum users (like me) who just use the forums and don't play the game anymore will probably stick around until Badspot either shuts down the website (I doubt this will happen though) or drastically changes it to where no one likes it anymore.
But hey, I'm just thinking as I type. I don't think anything drastic, whether good or bad, is going to happen in the near future.