Can photo shops be specialized?
Judging from what we currently have, they can. Just look at the kind of photo shops we have.
1. Express photo
2. Photo for Visa and other government use
3. Photo from digital camera
4. Photo print out only
5. Photo processing shops
Add one more to that category. Facebook profile photo.
Facebook is a personal marketing media, and people often spend a lot of time choosing and uploading their profile pictures. Photo shops in the metro area can bank on this trend. These shops can specialize in taking exciting / good looking profile pictures for Facebook only.