Currently reading through this too! I highly recommend checking out Neil Patel's YouTube channel if you want to learn how to create a banger SaaS offer and scale it. (One video in particular -- I'll try to find it -- talks about how to leverage free, simple SaaS products to get high-ticket paid clients (done-for-you offer, like an agency model) and/or customers (expanding the SaaS product's features), and he walks you through the process.) From a strategist's POV, it's definitely solid if your audience is super dialed in and you create something they really need.