Structure provides a proper working environment and work on all the logistic aspects (book flights, hotels, bootcamps/gaminghouse, PC, gear, etc ...) and obviously provides wages for the players and staff.
On the other hand, the players bring exposure to the team (by going far in tournaments, winning trophies, being popular on social networks and medias, etc ...). Cash prizes are divided between the structure and the players in a rate decided in the contracts.
The structure will use the exposure brought by the players to gather sponsors around it and sell advertisement. (main source of income for the structure)