Hello Arkeid0s!
All exclusive Patreon content is available for $3 tier and above, including past months exclusives. Since the Patreon page is only two months old, I have released 2 exclusives (animated lava pit tileset for the dungeon and ancient statues for forgotten plains). August Exclusive will be released very soon!
The 50% discount for patrons in already released packs applies to asset pack base price (becoming $1.50 per item instead of the usual $2.99). The discount doesn't apply to bundle price.
Thank you for considering supporting me at Patreon. If you have any other question let me know :)