In fact, Yusuf Zuck could guess what the Wilcox Family was thinking. They were simply trying to make use of his romantic relationship with Ruth Wilcox to extract benefits, implying that since he was marrying the most beautiful eldest daughter of the Wilcox Family's main branch, he couldn't just reap the benefits without any compensation, right?
So, they expected him to offer some benefits to the Wilcox Family in return, and then everyone would get along and make money together. Even if he didn't agree to the twenty-five percent, twenty percent might be okay, or even fifteen percent—they would take as much as they could get.
Unfortunately, they didn't understand what kind of person Yusuf Zuck was, which is why they lost. They lost to themselves and to their own cold-heartedness and ruthlessness!