There was one teaser in the development shots, one teaser in the communist community screenshots, and a reveal in the website interview.
You mean the early renders in the BeamNG official content section? Those were only released in the set of cars which were announced in 2012. The T-Series had an early model shown on its page, as far as I recall everything after that has had a page created with full release image at the time of release.
The bus was posted a few days ago but in the micro blogs, the camera is just inside the bus. I wanted to say something but I had no solid evidence at the time so I kept quiet.
Coffee mugs. Scale models. PC stickers. 3D logo. So many options, but manufacturing costs would be pricey.