Appreciate if I can get the experts help. I'm interested to take advantage of "Grindelwald-First opening offer" on 4-May (link: http://www.jungfrau.ch/nc/en/sommer/tourism/places-to-visit/first/offers/#grindelwald-first-opening-offer_197). The offer is "pay one way travel return". If I have half fare card, does that mean I still get the 50% discount on top of the opening offer? or the 50% is void because there's an opening offer?
Thank you in advance for your kind help.