Originally Posted by
pallhedge
Downgrading to CSP doesn't change the eligibility timing. You'll still be eligible 48 months after you got your CSR signup bonus.
It doesn't change the 48-month timing, but per Chase, CSP "is available to you if you do not have any Sapphire card and have not received a new cardmember bonus for any Sapphire card in the past 48 months."
So if I downgrade the CSR to CSP now, I guess I could cancel that CSP and open a new one to get the signup bonus. Still think I'll save the $47.50 (6 months of CSP annual fee) though.