I first got the Bilt Rewards Mastercard in November 2021. When the program launched they were with another bank, and launched with Wells Fargo in March 2022. Wells didn’t buy the back book. I suspect the lack of revolve by cardmembers – early adopters like me aren’t a super profitable bunch! – led to this decision.
So there have been Bilt credit cards from two different issuers, although all new cards over the past 27 months have been Wells Fargo cards.