ICICI Bank Credit Cards advertising on Facebook

Just saw this 5 minutes ago.

ICICI Bank Credit Cards is now advertsing on Facebook.

Orkut vs Facebook seems to be a popular topic amongst people in India. This advertisement by ICICI Bank Credi Cards might just be the beginning of Facebook's acceptance as a social networking platform frequented by Indians.

This brings me to another discussion. Effectiveness of text ads delivered by Google Adsense vs ads delivered by Facebook as a notification.

For an online ad to be effective, it should have following ...

1. Visibility - With those slick blocks, FB ads are far more visible than cluttered text ads delivered by Google.

2. Hook - Why would someone click on an ad knowing that it is an ad? Because of a hook. Hook like "Rs. 250 on your first purchase", no points for guessing which platform has better hooks.

3. Reach - Obvisouly Google Adsense leads by a long way. FB can display ads only in its network and Google can reach the dense rainforests of the world wide web.

In the long run, its hard to tell which one would win. FB looks better but they have a huge problem. The ads can only be served within the social network and hence is limited in scale.

Any other opinions?