If you have a half-fare EZ-Pay metrocard, there is an additional perk: If you use more than a monthly card, all trips from that point are FREE (for that month).
Anyone with an unlimited metrocard can enjoy that perk and use it as often as she or he likes. Half fare, however, isn't available to the general public. It is available to those 65 and older and those with the following disabilities:
• receiving Medicare benefits for any reason other than age* • serious mental illness (SMI) and receiving Supplemental Security Income (SSI) benefits • blindness • hearing impairment • ambulatory disability • loss of both hands • mental retardation and/or other organic mental capacity impairment
https://www.easypaymetrocard.com/vec...s/disabled.pdf