Originally Posted by
joakgarp
It's not possible to earn more than 15 elite nights/Bonvoy account apart from having a personal and biz US Amex card which gives 15+15.
So if you've already gotten 30 elite nights, you won't get anything more.
How do you know this and where does it say that?
I have written to Amex for the extra 15 nights in the hope of securing 45 in total which would be a great little boost!