Hello Brigidmac,
I do have a Swedish, Danish GGrandfather on my father's side and have traced that line back to the 1600's.
However, the other GGrandparents who came from Germany and Prussia (2 lines) don't seem to rate at all.
So, obviously there are quite a few ancestors not accounted for.
I don't know when it changed, sorry. I have not looked for a while as I cannot afford to subscribe right now, and just work on my tree.
Thanks for your interest.
Cheers,
Chris