Thanks.
I've been thinking about it more and I think my wife and I will both open a Blue Cash Preferred account. The 6% on groceries is limited to $6,000 a year. So getting 2 cards would give us $12,000 at 6%. A yearly savings of $720.
We spend about $6,000 a year on groceries at Kroger ($500/month, family of 5) so that would use up 1 card.
We then could use the other card to buy gift cards from Kroger to Amazon, Target, etc. to use or give as gifts and get 6% back. I don't know that we'd use the whole $6,000, but saving 6% on whatever gift cards we would buy and use would be great.
The other bonus (pun intended) is you earn fuel points at Kroger ($1 = 1 fuel point, 100 fuel points = $0.10/gallon of gas) and they often run specials where you get 4x the fuel points for buying gift cards.
Also, you get $150 for opening the CC and spending $1K in the first 3 months.