Some accessibility experts said live-game devices for blind fans risk becoming another highly publicized technology for disabled people that disappoints in practice and eventually descends into obscurity. Liz Jackson, a disabled nonacademic scholar and writer, in 2019 coined the term "disability dongle," which she defines as "a well-intended, elegant yet useless solution to a problem [disabled people] never knew [they] had." She said buzzy technologies marketed to disabled people often follow a predictable "announcement-to-abandonment cycle" and that above all, she questions how long these devices will be maintained. Rua Mae Williams, a disabled assistant professor in user experience design at Purdue University, said tech startups often fail to consider long-term sustainability when developing their products. The tendency of such devices to become obsolete disproportionately harms disabled people, Williams added. "When you're talking about disabled people being the users of your product, you're often talking about making them reliant on a set of hardware and software for daily functions with the knowledge that you intend to basically disappear within five years. And so if there's no clear statement of sustainability of how this product will continue to exist no matter what happens to this company, that's a major red flag," Williams told CNBC. OneCourt's Mace said the company views its plans to bring the tablets to homes as key to sustaining the business. "At the end of the day, OneCourt only exists if we continue to drive value for our fans," he said. "The technology at home is one avenue through which accessibility can be sustained over time and ultimately broadened." Many of the deals that sports teams have inked with device developers are on a short-term basis. OneCourt's current NBA agreements only last through the end of this season, though the Kings, Suns and Trail Blazers all told CNBC that they want to continue making the fan experience more accessible. There are still major obstacles that blind and low-vision fans confront in order to attend live games. Saavi's Moon said although he appreciates how OneCourt encourages blind people to participate in sports, he hopes guest services staff receive training to assist visitors, since he often experiences difficulties receiving accommodations and audio equipment at live events. The issues go beyond the venues. Beasley said the app for Ticketmaster, the NBA's official ticketing partner, is inaccessible for blind people, from the login process to seat selection. In a statement, a Ticketmaster spokesperson said, "The accessibility of our site and ensuring that fans have equal access to events is of the utmost importance to Ticketmaster. This is a big area of focus for the team, we are constantly reviewing our processes and we take on board all feedback to make improvements wherever we can." Technical difficulties are also inevitable. Some OneCourt devices didn't connect for users for an entire half of a game. Even with the challenges, NBA teams working with OneCourt said they're always looking to make their home venues more accessible, citing initiatives such as sensory rooms and support for organizations like Saavi. "Our fans are really at the center of our universe," said Matthew Gardner, senior director of customer insights for the Trail Blazers. "They're the ones who we're doing this for at the end of the day." Disclosure: CNBC parent NBCUniversal owns NBC Sports and NBC Olympics. NBC Olympics is the U.S. broadcast rights holder to all Summer and Winter Games through 2036.