I can now confirm I have received 120 tokens from seeing every live broadcast and encore so far, and also got the skins from the 3, 6, 9, and 12 hour tiers (confirmed by seeing Bastion skins, Brig skins, Ashe & Wrecking Ball skins). All other previously released OWL gray/white skins I owned coming into this promo.
Echo’s skins have NOT dropped for me yet. (15 hour tier)