Right. I wasn't talking about you but about teams in general, which is why I used 'one' and not 'you'. I thought that was the reason why you also used that term. In your case specifically, opitmal is whatever you choose it be... Perhaps promotion would lead to a sudden losing streak where your arena would no longer be full. If you were to lower prices to regain your crowd, you would be making less money. If you had space in your arena you could lower prices significantly to get more people than before and equal your income. Then again, having the potential to generate more income and not doing it seems les than optimal to me as well, since by not creating more revenue opportunities you are losing money, no?
Had you added one more seat to your full arena, would that ticket have been bought? If the answer is yes, then your arena is not optimal.
Once I scored a basket that still makes me laugh.