FamilySearch is the one major exception, mostly I believe because of their deep religious obligations. The Mormons microfilmed a staggering collection of data over the decades and it has all been getting digitized. The problem is, some of their digitized collections are now no longer available because the custodians of the original records seem to have signed deals with some of the private genealogy services.
Ancestry and companies like them, do provide the service of indexing many of these records which is no small task, but most of these documents are public records, and I don't understand why they shouldn't be available to anyone. I know for example FamilySearch has digitized images of all the Scottish censuses back to the 1841 but you can't look at the original records any longer. There are many other examples like this... original WWII draft cards for the US used to be available there, now you have to go to Ancestry and pay a fee.