Has anyone used cashrewards.com.au ?

I've used it 3 times now and I cant seem to get it right

I open a browser with the only page on cashrewards. I do a search on the site to find ebay,
I enter the ebay.com.au site via the cashrewards link,
I click on the 'paid now' option on ebay,
It sends me to the paypal page and complete payment

and yet it never shows a dollar amount anywhere on cash rewards, even though I set up the bank account details in the account settings. Don't know what I doing wrong, there was a similar site 3-4 years ago that used a similar method.

any help ?