The stadium has WiFi as well, and 5ghz nor 2.4ghz signals could reach all of the building, they would all have to be networked back into devices/ software designed for it. So according to your numbers you would need to mesh 250bt receivers into a network running to their specialized software
bt doesn’t have huge range and afaik the max number of active devices bt can use simultaneously is 7.
The stadium has WiFi as well, and 5ghz nor 2.4ghz signals could reach all of the building, they would all have to be networked back into devices/ software designed for it. So according to your numbers you would need to mesh 250bt receivers into a network running to their specialized software