Perhaps they got a good deal on the rent for the premises, and now that lease has run out ! and perhaps they're not shifting as much stuff as they like so it doesn't warrant keeping the shops open.
As an aside, I often wonder what these huge retail fashion places actually DO with all their unsold stock.
Years ago I was involved with the wardrobe dept of an am dram group, and I wrote to the Manager of the local TK Maxx, offering to pay a discounted rate for the evening wear that didn't sell in his store for our group. Never even got a reply.