Is it the tactic or the price that is shocking people? The tactic is common - heck the same people probably got excited about NASA Climate department correcting people on Facebook. I would be happy to get a million dollars, but it doesn't seem that absurd when you would need a small team for the last year - computers, desks, office space, payroll, benefits, software, etc.
It didn't work very well! Reddit is strongly pro-Bernie.
She needs to hire the same Russian crew (Olgino trolls) who do anti Ukraine information warfare. They use the bad cop good cop approach of information shaping.
The $1M would be better spent buying random folks Reddit gold or acts of random pizza. Then "leaking" it was her PAC that did this.