SUNSHINE COAST, Australia -- On a recent Saturday morning, Australians woke up to a full-page open letter in national newspapers suggesting they "vote against the demerger."

Mike Cannon-Brookes, co-founder of the software group Atlassian, has committed 1.5 billion Australian dollars ($1.05 billion) to climate projects. (Source photos by Getty Images)
Mike Cannon-Brookes uses election-style tactics in bid to halt AGL's coal power demerger