Quote Originally Posted by Darki View Post
It says it in two places:

2.3 Commercial Use. You may not exploit the Game for any commercial purpose (for example, advertising any product or service in-game, or use by the operator of a cyber café) without Square Enix's prior written consent.

2.8 Commercial Spamming/Spimming. You may not use (or abuse) the in-game chat and message services to distribute advertisements.

Source: Final Fantasy XIV Terms Of Service


com·mer·cial
kəˈmərSHəl/Submit
adjective
1. concerned with or engaged in commerce.
"a commercial agreement"
synonyms: trade, trading, business, private enterprise, mercantile, sales
"a vessel built for commercial purposes"

2. making or intended to make a profit.
"commercial products"
synonyms: profit-oriented, money-oriented, materialistic, mercenary
"a commercial society"
They mean real world commercial here.