No offense Nickelob but this has nothing to do with you. Its not about what you consider a good build, or whether or not you like Isar. The trade is none of your business. This topic isn't even about it.
Ninja and I both got what we wanted. What is your problem? Are you jealous that I was able to get a free game? It was $5, its play money, get over yourself mate.
The Isar Tower given to him has an evented power system, several floors including an upstairs restaurant, and has a frame and a 'capsule' on top as the exterior. The main appeal is the events and the interior spaces, two floors became open to public building.
Contrary to what people say, no dupe was used to build Isar structurally as I didn't host often and had no add-ons at the time. It was later enabled on the public server where it was used to duplicate the generators, teleporters, and tweak floors.
I think for one of my first 'major' builds, considering it was made almost 3 years a go now, I did a pretty good job. It isn't a pretty build, but it isn't meant to be.
The reason why certain people want it is because I staged it to have an air of exclusivity. It was also used to make a 3 part Blockland machinima. People like to roleplay in it, play with the power system, and so on. It was also publicized on the Blockland YouTube channel when Aludane and I renovated it.
I very much enjoy the fact some people love it and others hate it, but to call it a "duplicated base with a few ramps" is pretty butthurt, whoever said that. This build has been used, enjoyed, and appreciated almost certainly more than anything any of you in this topic will ever make. Whether or not it defines perfect building (which it doesn't) is besides the point.
Now please return to the actual drama or find something proper to get worked up over. Right now you are fighting about nothing and targeting nobody good for any good reason.
These are the photos I can find of the final version. click them for bigger size.

Probably more in that Isar topic somewhere, find it yourself.
The ultimate answer: Ninja leaked it, its his problem now.