Just to clarify a few things, RTB development is over and as you can see it will cease to exist beyond March 1st. As it stands, I won't be playing any part in the future of Blockland's development either. This isn't a trick - I genuinely have no plans for Blockland or RTB.
I'll put together a tarball of all submitted add-ons at some point to make downloading everything easier.
RTB Hosting will continue to exist for the foreseeable future.