There’s also the model The Guardian uses: a trust (now basically a venture capital fund) that exists to support the news outlet.
In addition, the outlet solicits donations from readers and is considered as one of the innovators in finding other ways to fund on-line journalism.
That’s not to say that the Grauniad doesn’t have its problems. They still publish op-eds from TERFs and Putin appeasers who are chummy with the senior editors (a disease that infects many British institutions). But they’re open about their generally liberal outlook and aren’t beholden to advertisers or a clickbait engagement model.