I really tried to look everywhere for this information, Googled it, etc, but I just can't find it if it's out there...
Ok, so my dad and I play together when he's over.
But I want to keep my PERSONAL account (progress, cards, level, upgrades, etc) and the FATHER & SON account separate.
So I can play by myself with my ME@EXAMPLE.COM login, and when my dad is here we can log in as ME_AND_DAD@EXAMPLE.COM ?
Then when I'm playing alone or say, on my phone, I can do so not interfere with the progress of the FATHER & SON game.
Is this allowed by the terms of service?
One technical thing that might factor in is that I would use the same EXAMPLE domain name, because my dad is 76 and really has no freaking clue about computers and "the email". He still goes around and pays his bills in person with a humungous wad of cabbage on pension day.