Transfer of credit limit to new card

I'm interested in applying for an Amazon Prime credit card. The Amazon card is through Chase where I already have a Freedom Card with a $25K limit. I pay off the card monthly and this limit is well beyond what I would ever have on there.

I'm attempting to minimize the effect on my credit report and not apply for an additional credit. Chase offered to transfer $15K of my freedom limit over to a new Amazon Prime card. On first glance this seems exactly what I'd like to do.

Curious if anyone knows whether or not this manuever would affect my credit score at all. I'm not increasing the credit limits in my name so it seems like it wouldn't. Am I missing anything?