For all models except MAYBE the Mustang and the Escape Hybrid. A-plan is more of a discount than the X-plan. X-plan is about $800-1,500 less than sticker depending on the price. The higher the sticker, the more you get off.
They are offering it to everybody, but you still need a sponsor I think. That is where I come in. :-D A-plan is the deepest discount avaliable to the people that make the damn company money (me). A-plan is as low as you can go.