Scott A. Reed
It would seem to me that the Billboards would still add tension to the game as they add points to an area in the same way as the Greenspaces/Fountains do. Thus reserving a space in order to build there in a later turn not only robs you of points, but can potentially give points to your opponents.
True, but with judicious use of billboards, you can also close up an area such that other players will not get to play in that neighborhood, and also get bonus points for yourself so long as you have the highest building in that area. In our game of Skyline 3000, I took a whole area along with another player, I had a 1-story and 3-story building, and he had one 2-story building. We both put down billboards in the neighborhood, and the other spaces were taken up with parks. He wouldn't put a building on his billboard space because then I could have overbuilt on my space, and same for me, but we both coasted through the game gaining points off that neighborhood to the exclusion of the other two players.