The twist would be to force the user to download an app in order to be able to use the wifi. Would this be possible to do? Simple hotspot + CPA/CPI. At least in my experience there are a lot of airport with worthless shitty slow wifi, but I guess that's what happens when there are so many users on it even if the airport got 1 gbit/s internet. If I would share a 100/100 hotspot I guess that it could only hold max 100 people before getting unbearably slow. And not to mention if someone starts downloading shit on the connection, that would require me to limit the speed for each user, right?