Their main funding comes from Aileen Getty, the granddaughter of Jean Paul Getty II, an owner of a fossil fuel company. A man who was considered one of if not THE most rich people on planet Earth. Yes, the main funding for Just Stop Oil comes from... oil.
The fossil fuel companies FUND these organisations. In part because they want the blame shifted squarely on to us, the consumers. Why? Well, for one thing, one might question the obscene amounts of lobbying, tax evasion and dirty tactics they've used to stop all alternatives from coming to fruit (smear campaigns on Nuclear power that still hold to this day, anti-solar lobbying, that sort of thing), but also because they want us to feel some element of responsibility when all we are are literal peasants scraping by to them. If they really wanted the levels of emissions cut, like I mean REALLY wanted them? It could be done. It won't, and certainly not by campaigns targeting somewhat innocent sporting events like Wimbledon or whatever. And it's unbelievable how much I despise the narcissistic bellends that try to lay the blame on everyone but themselves.