Dortmund often has to sell their talented players because they don't have enough money even though they're really good at developing stars like Bellingham and Haaland. Even if they get more money they might still lose their best players because other teams offer them a lot of money. Dortmund is good at playing against strong teams like Bayern Munich and in the Champions League. But winning trophies might still be hard for them. What special about Dortmund is that they are really good at helping young players grow and that something to appreciate.
Selling a lot of players didn't mean if the club would be going to be rich but there are so many things that need to be done by the club. The financial report has been fully explaining about where the money raised from selling the players are going on.
Playing tax is also becoming one of the biggest outcome from dortmund by selling the players.
We should praise the Dortmund club. They must improve the profitability of player sales to maintain the team's existence without significant sponsors. Dortmund has made a profit from the 2023 Summer transfer period. They sold the team's most valuable star, Jude Bellingham, for more than 100 million euros to Real Madrid, bringing it back from Birmingham City for only 25 million euros. Dortmund will continue to bring in good and cheap names like Ramy Bensebaini and Marcel Sabitzer... To make profit.
Can you look at the big clubs in Europe? They are gradually weakening as their funding slowly dries up. They will sell their players to Saudi Arabian clubs to maintain the team. It's just a matter of time. Many clubs even have to deal with Qatari owners because there is insufficient funding to develop the unit.