Most airports offer wifi in following variants:
#1 unlimited free wifi access
#2 time-limited free wifi e.g. 2 hours, after this one has to pay
#3 pay upfront for wifi

I happen to be in a #2 airport and figured that by changing my MAC address I should be able to circumvent the artificial limitation by the airport through knowing my initial MAC address.

On my macbook though the commands “`sudo ifconfig en1 ether 00:e2:e3:e4:e5:e6“` don't seem to work after the year 2018 (thank you apple). After some search though I was able to change the MAC address and enjoy now unlimited wifi while waiting for the airplane.