Some guys in Moscow city offer a new approach for a street advertisement.
Due to a constant dirty weather during most time of the winter and spring most of the cars are dirty.
The most dirty are the public transportation means like buses.
So these guys find a way of how to use this and get some profit. They offer a "cheap advertising" - writing your classifieds or other information on the dirty buses of the city.
They hire cheap workers who write the information on buses, trucks and other cars why they stand on a traffic light or in a traffic jam in hundreds, after that all the city is full of the cars carrying your classified.
And there is another side of this method - those who don't want to carry the commercial on their bus have to wash it - thus making the city looking more brightly.