I received this in an email. It is not detailed in the URL Link that I have provided.:-
TAKE OFF SOONER WITH 25% BONUS VELOCITY POINTS
As a Platinum Card Member, you'll receive 25% bonus Velocity Points when you transfer 2,000 or more Membership Rewards points to your Velocity Frequent Flyer account between 1 May and 31 May 2016.2
If you have already transferred your points from 1 May 2016, you'll still be eligible for the 25% bonus, which is an additional 10% on top of the publicly available offer of 15% bonus.
This means 1 Membership Rewards point is equivalent to 1.25 Velocity Points when you transfer your points during the month of May.
Edit I found a decent URL http://ebm.email.americanexpress.com/c/tag/hBXK-PTAQB6DpB9NS…
Note: I did a transfer on 4 May and received the 25% bonus.
Plat Charge card I assume ?
Having plat edge and was the normal 15% more points promo