Yeah, every club have own way of making a lot of money. Dortmund are actually good, they make money quickly in the transfer market. Their management is smart in selecting and developing players who have great potential in the future. Slowly they will get the title if they have great squad depth, because when they sell their players they also recruit other players, right? It's a good business, but don't blame Bayern Munich because they also have a good business. Apart from the Bundesliga title, they have a target for the UCL title. Imagine, if they get the UCL title they can make big money at there and trophies of course, as well as lots of sponsors coming.