Brainstorming! No wrong ideas. Try to give a reasoning to your thinking.

It is likely that most greylisted projects will be greylisted only for short periods of time due to temporary lack of WUs. If we implement Total Credit Delta (described in the 4.0-2018 Roadmap Proposals) this will have a noticeable effect on earned MAG, and, of course, science and data analysis completed.

So.

If we are to do a greylist...

what if we somehow implement a secondary project mechanism? This mechanism would automatically redirect your cycles to your chosen backup, or secondary, project choice should your first project choice be greylisted for one reason or another. As soon as your primary project is degreylisted/rewhitelisted, your cycles are automatically redirected to its WU.

I'm thinking about people who don't want to keep track of everything every day.

Let's see what ideas we can come up with!