A promotion, a huge pay rise and a contract saying I would never publish anything about my work 是主语,后面的 was offered to me 是被动语态的谓语部分。
显而易见,主语部分是动名词短语的复合结构,其中的 a promotion, a huge pay rise and a contract 是动名词 saying 的逻辑主语,后面 I would never publish anything about my work 是动名词带的宾语从句。短语作主语属于单数概念,所以后面要用 was offered to me。这句话的意思是 “一次升职、一种大幅度的提薪和一种契约表明我从来不会透露有关自己工作的任何信息这种事情被提供给我(直译)”。
逻辑一致,升职加薪保密协议是一整套的,不分开。