Dortmund is a footballer factory. Yes, that's what they know best. They also make good money. But I'm sure they must have found the price they set for Haaland low. There must be a lot of teams that will pay a very high transfer fee to Haaland. Still, they made good profits. Their strategy should set an example for all teams.
yes, when other teams can follow what Dortmund did, I'm sure the teams in the German League must have good finances to manage their team. apart from sponsors, of course, getting an injection of funds from player transfers will help the team financially. If all the teams in the German League were as capable as Dortmund, then the German League could become a league with rich teams.