The weekly services used to be offered at the same times, but at the Polynesian Luau area, before they were stopped. I remember that the protestant services were held by a series of visiting ministers representing their local church; and the thing that impressed me the most was that the offering taken was sent to charity (a food bank or homeless shelter ministry if I remember correctly) and did not go to the church. To me it came across as a pure, simple action that left an impression.
Wish they still had those weekly, but at least the holiday ones are nice -- especially since it is complicated for many people to get off Disney property.