This is what happens when consumers use software to do their shopping for them, to compete you must play the software's game. The fault really lies with the software and its not including all costs when making a comparison,in my opinion rendering it useless as poorly written programming. Presumably this credit card information is saved on the site providing marketing leverage and opening you up to their security good or bad. I NEVER give the CCard info until I have a price, that's just dumb, no price no business.