They probably need the capacity for more lucrative products. I seriously doubt they will not be manufacturing something. Supply and demand sets the price of course so increasing prices are a result of reducing supply, of course.
But they're cutting the supply... it's got like there aren't enough materials. It's like holding a sandwich above a starving person and not giving it to them until they pay what you want them to.
There is only so much capacity to produce these things, and it’s shared with other products like CPUs and other chipsets. I don’t know for sure but probably they either could not pay asking price to produce in same quantities as before (due to increased demand of the fabrication facilities) or Samsung is choosing to product more of another product that shares the same fab.