lipoff

I have a couple questions about the AAdvantage Aviator Silver Mastercard; I've tried searching the forum and wiki and I can't seem to find the answers, so thought I'd ask them here:

1) I see it gets 3 AAdvantage miles per $1 of spend on American Airlines. Does it still get only 1 loyalty point per $1 of spend whether or not that's on American Airlines purchases?

2) If I designate an authorized user, do they get a card tied to their own AAdvantage number, or to mine? Does an authorized user with their own card get the one free checked bag benefit, or does that only apply if they are flying on the same reservation with the primary card holder?

Thank you!