coops, great writeup!! Can you share some tips for load testing features that are going to incur lots of writes (e.g., likes) that can't be tested in dark test.
if i recall correctly, likes were pretty dark-testable, since we didn't make them visible until we released them. so we were able to use a methodology similar to the infinite-scroll dark test--X% of items viewed by client in the app triggered a like on that item. we then cleaned up all the likes shortly before releasing the feature.