You changed 5 variables. One metric: total growth (50%).

The question: Which variable caused it?

The answer: You have no idea.

When multiple variables change simultaneously, you can't determine causation.

Research principle: A/B testing. Change ONE variable. Hold others constant. Isolate the effect.

You didn't do that. You changed 5 at once. Now you're guessing which mattered.

And humans are terrible at guessing causation.