page 6 of weekly ad for next week (scroll down to pick upcoming promotions to view that ad) May need to select "shop by page" then view "upcoming ad".
Valid 8/18/2019–8/24/2019. Subject to availability. See gift cards for details, terms, conditions and (if applicable) fees. All trademarks are property of their respective owners. Product may not be available in all states. Thee gift cards featured are not sponsors of or otherwise a liated with this company. Offer valid in store only. Limit 2 per customer."
They may offer 20% for online gift cards like they have done for some previous promotions in the past but as of now, the ad specifies in-store only.
(For reference only)