I can find more than 50% of Ancestry sources: census, passenger lists, marriages, land records on FamilySearch- FREE. It’s taken some time. Philippa Johns has 15 sources, I’ve converted all but three from $ Ancestry sources to FamilySearch sources, same exact sources, sometimes with better info. I don’t see a downside. Especially for the England census of 1841 and 1851 which on Ancestry I can only see with an $ international subscription. What’s the benefit of Ancestry sources? I don’t know.
FamilySearch is soon going to require all visitors to register but it’s free and doesn’t have the email barrage of Ancestry’s free membership. There must be a benefit to using Ancestry $ sources, but no idea what it is at this time.