many have also had these projects fall apart or rot away. (Remember Voat?)

Yes, why is that.

Oh, right, it's because they refuse to address monetization from the get go.

Whereas 4chan has outlived all of them despite being the Mos Eisley of the internet... because they sell ads.

You can build a successor, and you can keep it running if you build an audience and build a pool of advertisers who don't give a damn about the SJWs. But too many people starting up new alternative sites try to start from a principled position against advertising.

many have also had these projects fall apart or rot away. (Remember Voat?)

Yes, why is that.

Oh, right, it's because they refuse to address monetization from the get go.

Whereas 4chan has outlived all of them despite being the Mos Eisley of the internet... because they sell ads.