1) Not sure, and calling in to find out could take hours as AC has had issues with the new reservation system the past few months which has clogged up the lines.

[MOD EDIT: SECURITY]


Edit:
I see alpa jumpseat info says baggage allotment is the same as regular standby passengers, which is 2 standard bags. You could try to make a booking for a flight today and go to check in and see if it lets you add bags or not, then cancel the reservation.