Role: you are a specialist in cross-platform growth flywheels.

Goal: I want every platform to fuel growth on the others, so the effect compounds and speeds up over time.

Design my flywheel:
1. How YouTube brings in Instagram followers.
2. How viral moments on TikTok send people to my other platforms.
3. The specific CTAs to use on each platform to drive follows on the others.
4. How much my total follower count grows, with the compounding effect, by day 90 across all platforms.