Added this to Deals as you need to Top Up your account to benefit from the free 1.5%.
Simply click the link, click the register button & then click the top up button - no need to be invited as per the link suggestion, appears to work for most people.
You top up your account credit, with Amazon giving you an extra 1.5% in the process.
Not a huge amount, but money for nothing.
Offer expires 31/08/17