It was really aggressive for Google to give away $10 with their new PayPal killer “Google Checkout” a couple of weeks ago.
It was even more aggressive for them to promo Checkout on the Google homepage.
It looks like PayPal is responding by giving away $15.
If this was 1999 and these weren’t two highly profitable companies I would be thinking “bubble,” but it’s obvious this is just a dog fight for customers.