Cheap cigarettes..........?

I usually buy the five dollars a pack cigarettes like Marlboro or Camels. I've been out of work some and I'm trying to wash and detail cars to bring in a little money until these places I put in hire me and I've switched to super cheap cigarettes that are like $2.50 a pack.. I smoke those Rave Menthol 100s, Riversides, and sometimes Pyramids. Why is it that the cheap cigarettes smell like herbs and not tobacco? And they taste like grass? And it doesn't really satisfy a nicotine craving like a Marlboro or Camel does? Do they not use just tobacco in the cheap ones?