Like others mentioned, hdfc is not known for their technical implementation. Though the options are there but if you click on apply then either you will get error or it will let you proceed to the last stage & then give error or it will let you finish the entire application process only to get a confirmed rejection afterwards. ICICI is always considered having the best technical implementation among all Indian banks & it shows here as well, if you click on amazonpay card apply link on icici website it straightaway redirects you to amazon India.