Yes, it is the credit card swiper. When jetBlue ordered the PTV screens years ago (in MEGA
bulk quantities), the DirecTV service was going to be $5 per flight. However, at the very last minute, they decided to make the service free. As the IFE expands, jetBlue will be adding Pay-Per-View movies (free on flights where DirecTV service cannot be accessed)-- these will be available by either paying the FA
or swiping the card.
Hope this helps