Here are the terms and conditions from Universal’s website. I don’t see any limitation on number of people who are admitted, but there could be one.
The 3-Park “2021 Military Freedom Pass” Promotional Ticket entitles one (1) guest admission to Universal Studios Florida, Universal’s Islands of Adventure, AND Universal’s Volcano Bay (Universal’s Volcano Bay is closed November 2, 2020 through February 28, 2021) theme parks on the same day. Ticket is valid for use January 1, 2021 through and including December 31, 2021, with no blockout dates. Excludes separately ticketed events. This ticket also includes admission to select live entertainment venues of Universal CityWalk. Guest must present a valid Military ID at time of purchase, at time of the exchange at either Universal Studios Florida, or Universal’s Islands of Adventure theme park ticket sales window, and upon redemption at both Universal Studios Florida, and Universal’s Islands of Adventure theme parks. Unused days shall be forfeited. Additional restrictions may apply.
The above Admission Media is non-refundable, non-transferable, and must be used by the same person on all days. Standard entry includes biometric scan. Valid only during normal operating hours. Parks, attractions, or entertainment may: close due to refurbishing, capacity, weather or special events; change operating hours; and otherwise change or be discontinued without notice and without liability to the owners of Universal Orlando Resort (‘Universal’). Unless otherwise stated, does not include admission to separately ticketed events at any of the Universal theme parks or within any of the CityWalk venues, Universal Cinemark, the Blue Man Group show, or Hollywood Drive-In Golf™, and parking or discounts on food or merchandise. Some CityWalk venues require ages 21 or older for admission. Valid Photo ID required. Additional restrictions may apply and benefits are subject to change without notice.