Hey!
To add more details about "Gursimran Singh Pabla's" (that doesn't play at BuzzerBeater anymore =_=") question:
1) We can't sell arena seats like just said Prashant Arora;
2) But we can increase the prices on the "Arena" page;
3) Plus, we can also expand the arena by building more seats in order to be capable of welcoming more fans and thus more money;
4) And finally, we can also change the name of our arena at anytime. But this will cost $10.000 per changes.
I know it's a little bit late, but it might help someone else ;-).
Cheers!