Many artists had worked long unpaid hours on Snow White. Instead of overtime pay, virtually all employees were given bonuses for their efforts, some large, some small. This procedure was afterwards discontinued, and much of the revenues from the feature went into building the new Disney Studio in Burbank. Importantly, the Studio's revenues had been cut in nearly half by the WWII in Europe. By early 1941 artists were being let go without explanation, even when senior and very skilled. These layoffs lead directly to the Disney animators' strike in the spring of 1941. In an FBI interview three weeks after the strike began, Disney blamed these staff cuts for the strike. Nevertheless, two weeks later Disney placed an ad in Hollywood trade papers stated the strike was caused by Communist agitation!