Originally Posted by
nineworldseries
It really seems pretty straightforward that anything listed as "base miles" in mileage activity will convert to LP, but any "bonus miles" will not. Everything AA has said (except perhaps for Bask, no experience with how those miles code) seems to support this interpretation.
Until about a month ago Bask Bank miles posted as Base Miles to AA, then they began posting as Bonus Miles, no doubt because of Loyalty Points.
As they've proven with that change to Bask Bank, they can change how any partner posts at any time, hopefully in the future they will give some notice when they decide to make those changes and we don't find out about them until after the fact (i.e., when they post to our accounts).