Text-only ad wants you to text for change

As a career Copywriter, and an English speaker, I have a soft spot for compelling texty ads.
This one is no exception:
Click to read call-to-action. It’s an invitation to text UNICEF to support the campaign against child marriage.
Simple, clear, and disturbing. Nice work!
Advertiser:
UNICEF
Agency:
Rapp, London, UK
Additional credits:
Creative Directors: Paul Turner, Robbie Rae, Rik Haslam
Art Directors: Paul Turner, Robbie Rae
Copywriters: Robbie Rae, Paul Turner
Design: Adrian Whatman
Source:
Ads of The World