But more often than not, the author of the extension was fully aware of all the consequence came with the deal, the money was just too good to say no.
The developers are accepting cash offers to inject malware into their extension. They know damn well what they're doing, and the good ones... don't.
The developers accepting these offers aren't some maligned, innocent party - they are the people spying on you...
That's the only famous example I can think of though.
But more often than not, the author of the extension was fully aware of all the consequence came with the deal, the money was just too good to say no.