In the UK, Pound Shops (like dollar stores/99c stores) used to be small, unique and independent.
Since the financial crisis in 2008, large chains such as Poundland and Poundworld have come into more prominence, and in some cases have out-competed the independent stores, forcing them to close.
I could call this process the "commoditzation" of the Pound Shop, but it's not quite right. It has become more common but has not really become a commodity. I can also think of "homogenization" but I'm looking for even better words.
Can anyone offer a good alternative?