My mum and I both got 15% off codes when her ife broke in J YYZ-SFO since the SD was nice and gave us both the small cards where you have to fill out the form online. From AKL-YVR in J I had my ife break mid flight and the FA said she’d get me what she said was the better compensation and she had me fill out a full page form with my info on the flight and 10 days later I got a $150 eCoupon emailed to me. Those have been the only two times I’ve had a broken ife so I guess it might be flight length and potentially crew dependent but I think I’ve read about more instances of 15% coupons on FT than anything else so that may be more typical.