1,2,3,4 - Yes
5 - The promo card is exclusive and will only be airdropped to those who bought pre-sale packs. So this card will not appear in packs.
6 - The future 13 cards will be airdropped in a similar fashion (packs requirements for a guaranteed airdrop will vary depending on card rarity). The difference is that these cards will be available in packs from the moment they are introduced.

Not sure exactly what you were referring to during the AMA. If you can find it in the recording please let me know the timestamp.