ABC company uses XYZ company's proprietary sweetener in its protein bars. ABC Company has had great success in part because customers liked the sweetener used. However, ABC Company never asked for permission from XYZ to use their sweetener in their products. After XYZ found out about this, their attorney sent a letter to ABC Company threatening a lawsuit if they did not stop using the sweetener. ABC then approached XYZ Company and the two agreed that ABC Company could continue to use the sweetener as long as they advertised the sweetener in bold on their packaging. This provided ABC the opportunity to continue to use the sweetener and it provided XYZ with a free way to advertise their sweetener on the ABC packaging. This is an example of what type of legal strategy?