As per slack thread, Growth is running an experiment on special:CreateAccount and accountCreation

Rationale for rarity of surface visits and therefore low effective enrollment:
From Phab T422295: [V2 experiment release] Mobile web account creation form improvements + username TL;DR: Existing baselines: ~2,500 new accounts created on enwiki per day stats.wikimedia

From the last experiment (at 1%): ~2200 users per week

Sampling at 50% would give ~111,700 users per week, which would reach statistical power by ~6 weeks.

*Acceptance Criteria*

• Update config for we-1-8-account-creation-form-v2 in the database to 50% nominal enrollment