RE: do ailerons provide lift?
OK, so how about ailerons that aren't part of the wing? The Stuka and Ju-53 are airplanes that have isolated ailerons. They are not part of the wing. They do not touch the wing in any attitude and are connected by rather small offsets.
When the designers of those airplanes came up with their somewhat unique layout, they included the area of those remotely attached surfaces with the area of the wing to figure wing loading, pitch stability etc.
Yup, ailerons are considered to provide lift. And it's the lift designers consider when figuring what the plane can carry and whether it can fly with or without carrying anything.