In the same offer, for different types of HDFC Bank Credit Cards, the points are offered in a different range for ONLINE TRANSACTIONS here is the one they have informed us,
Signature / World Card - 10 points for Rs 150 spent
Platinum Plus - 10 points for Rs 150 spent
Titanum Card - 10 points for Rs 150 spent
Gold and Silver as stated above - 5 points for Rs 150 spent
Validity - till Jan-31-2010.