In game alliances

How many people use in game alliances i don't mean secret or game long i just mean for a couple of turns to gain a bonus or to attack a much stronger player. I personally hardly ever use it i think i have done it 3 times in my time on CC and they were both when i was trying to take out a stronger player. I haven't used one in about 3 months and i highly doubt i ever will again.
So i was just wondering what your thoughts are on it and weather or not you make alliances.
So i was just wondering what your thoughts are on it and weather or not you make alliances.
