According to themselves, they had an impact. The Lincoln Project would say the same thing about themselves.
The Lincoln Project, despite getting $60 million dollars didn't manage to even prevent Trump from increasing his share of the Republican vote. Entire thing was just grift. Although since this time the neocons were grifting off the libs instead of us, I'd think it was funny if it wasn't for the pedo shit.
In all seriousness though, the article itself describes "the secret history of the 2020 election" as something that "sounds like a paranoid fever dream." I understand that for you this may just be how the sausage gets made, but most of the right does not think of "Our Democracy"(tm) as something managed by "an informal alliance between left-wing activists and business titans."
As far as specifically what's admitted here that we'd like to think is unusual,
"More than 150 liberal groups, from the Women’s March to the Sierra Club to Color of Change, from Democrats.com to the Democratic Socialists of America, joined the “Protect the Results” coalition. The group’s now defunct website had a map listing 400 planned postelection demonstrations, to be activated via text message as soon as Nov. 4. To stop the coup they feared, the left was ready to flood the streets."
Hard to imagine this doesn't also involve BLM Global Network, which is funded through Thousand Currents, which had a vice chair who was convicted for activities she participated in with a left wing organization that carried out armed robberies and bombed federal buildings, or "Refuse Fascism", which is a rebranding of the organization that used to call itself the "Revolutionary Communist Party, USA."
But hey, I guess for a party whose last president launched his senate campaign in Bill Ayers living room, maybe those connections are all business as usual too.
Or how about the US Chamber of Commerce and AFL-CIO having an intermediary that both refuse to name?
Or how about that "the media organizations that would be calling the election" were using info they called "tremendously useful" supplied by left wing activists?
Also, as others have pointed out, many of these "disinformation defense" meetings took place in 2019, before the pandemic had even begun in China, well before it was clear that mail in voting was going to be widespread.
When's the proof that the Democrats funded Antifa and BLM with Chinese money gonna come out then?
Money is fungible, so never, even if they did, which IMO isn't particularly likely. There's enough rich left wing people in the US to fund the left.