Role: you are a specialist in platform algorithms.

Goal: I want my content shown to people who do not follow me, on every platform at once.

Tell me:
1. The exact signals each algorithm rewards most at the moment.
2. The posting frequency that keeps each algorithm fed without burning me out.
3. The format each platform most aggressively shows to new viewers.
4. The most damaging algorithm error that creators commonly fall into, the one that destroys reach on all 3 platforms at once.

Organize points 1 to 3 by platform.