This is how the scam works. It's extremely simple.
Astroturfed climate celebrity Greta "How Dare You" Thunberg recently deleted a five-year-old tweet that said the world had five years left to take decisive action in order to halt a climate catastrophe. Quietly, in the dead of night, the tweet was memoryholed. And the clock resets.
Just like the end-is-nigh cult preachers that reset their predictions of the date on which the world ends after the first doomsday has come and gone while the planet keeps turning. Unfortunately for already squeezed taxpayers in the developed world, the climate cult high priests cannot be ignored. They intend to extract their pound of flesh, and then another, and then another, until the flensed carcass of the body politic expires from blood loss.