As early as may 2019, epic pulled many Ubisoft games off the shelves due to the problem of uplay integration, and the official apology announcement issued by epic indicated that this was a unilateral problem of epic. In fact, the problem was related to the account security function design of epic store in that year. Recently, due to the lawsuit with apple, an email revealed that, Even the boss Tim Sweeney personally sent an email apology to Ubisoft.
At that time, epic store was easy to create fake accounts, and there was a very weak link in the account security system, which could not stop the games on other related platforms. As a result, even if your epic account is blocked, you can still play games with the associated uplay account. This is also the problem of uplay integration mentioned by epic. On the other hand, the Ubisoft game purchased by players on steam can't be started on uplay when steam is closed, that is to say, if steam is blocked, uplay can't start the game any more.
So some people use their black cards to buy Games in epic stores, and then sell the related uplay accounts. Although epic will directly disable the game for the account in the future, the Games in the associated uplay account can still be played.
In May 2019, epic made the decision to temporarily remove Ubisoft games such as "global blockade 2" and "era 1800".
The email also showed that the fraudulent purchase rate of epic exceeded 70% within 48 hours, with the peak close to 90%. The fraudulent purchase rate of games in other epic stores is generally less than 2%, while that of Fortress night is less than 1%.
So the situation was so serious that Tim Sweeney, President of epic, apologized to Yves guillemot, President of Ubisoft via email. It's all epic's problems when it comes to removing Ubisoft from the shelves, and it's guaranteed that it won't bring any loss to Ubisoft.