10M when Dembele will play 50 matches. He is on 45 matches now.
10M if we qualify for a CL in 2017/18 season.
Some sources say that we have already paid 5M for 25 matches paid 5M for reaching a Champions league in 2018 season.
Other sources say that we need to qualify for a CL in each of the next 4-5 years for those 10M to be paid.
Other 20M of addons are a secret and papers think that they are linked with Dembele's performances and team's success, like he needs to score a certain amount of goals, Barca needs to win La Liga or a CL etc.
Some other sources also say that we need to pay additional 30M penalties (regardless of a regular 105M fixed and 40M in addons) if we decide to sell him before his first contract expires.
I guess that a ratio of that clause is:
If Dembele stays here for 4-5 years, he will reach majority of addons, and Borussia will get 145M in the end.
If we sell him after 1 or 2 years, Borussia would get only 105M plus 15-20M addons achieved by then, and they would lose a chance to earn all 145M.
This is why they have included this clause. So, if we sell him after 1, 2 or 3 years, we will have to pay, let's say: 105M fixed, 20M addons achieved till then and additional 30M penalty for selling him before he could have achieved all potential addons clauses.
