Utterly bizarre, they weren't listening to a word I said yet wanted me to lead one of their companies?!
Have they finished displacing Medium yet? Who in turn only appeared a few years ago?
Have any normal people even heard of these companies?
Medium went for a bottom-up approach, trying to monetize the content of the crowd. Substack is going for a top-down approach, grabbing writers with an existing large following and paying them top rates, which are justified by the conversion rates for their well-known creators.
Normal people might not have heard of these companies, but niche audiences certainly follow some of the specific authors/columnists/influencers and are following them onto substack with paid subscriptions.
Is that a moat, or will they jump to the next platform? A few have been poached by the NYT and other venues, so maybe the moat isn't that big.
If you think Google was a fast follower you are incorrect. There are patterns to how these types of company crop up and they are about revolutions in how a field is done rather than "copy AltaVista" and see if you can catch them. Nobody succeeds at copying a company that has a genuine mission to accomplish.
I'm not saying it's impossible to build a company that happens to do the same thing as say Substack but you have to build it for the correct reasons and fast followers are generally always compromised in some way.
Your glib suggestion that Google, a once per decade company, is a follower of AltaVista really doesn't do any of what Google accomplished justice.