Our ratings and projections are fluid. The NBA team updates minute, usage, and point projections throughout the day in response to news and Vegas line movement. We try to keep a running list of updates we have made on the Player News page. However, sometimes players are updated without a corresponding news item.
Initial projections are set the evening before the game and the projections are updated through tipoff of the evening's latest game. One consequence of this is that if you optimize a lineup historically, it may not be the same optimized lineup you were suggested at the time of lineup lock that night.
Another common question we receive is "Why did the optimized lineup change when I optimized twice within a minute?" In this scenario, it's likely that the user was using the optimizer during a projection sweep