3X points for grocery spend on Southwest Rapid Rewards credit cards. Unsure if this is for everyone or targeted, but all versions of the card are eligible.
From the email:
Earn 3x total points per $1 spent on grocery store purchases on up to $1,500 total spend per calendar month, May 1-June 30, 2020, when you use your Southwest Rapid Rewards® Credit Card.* That’s 2 points on top of the 1 point you already earn on grocery store purchases with your card.
You’ll earn the extra points even when you order online for pickup or delivery from grocery stores and eligible grocery delivery services like Instacart. No activation required — you’ll earn the points automatically
Eligible credit cards: Southwest Rapid Rewards® Premier Credit Card, Southwest Rapid Rewards® Priority Credit Card, Southwest Rapid Rewards® Plus Credit Card, and the Southwest Rapid Rewards® Employee Credit Card.