Not sure what the problem is. The ad is pretty clear that the 10% bonus is on "interest earned".

This was one of the better deals out there when I put my emergency savings in it. My wife and I have $15k in it, so that translates to about $18 bonus per year (1.2% APY). Not a lot of money, but the bonus makes this one of the better accounts on the market.

Since her parents live in Australia, we're looking to switch over to an Australian savings account. The tax rate is 40%, but the savings rates are much higher at 5%.