I just completed SUS, and implemented Amplitude establishing primary and secondary metrics that I believe result in growing revenue for my startup.
While I've been successful at data capture after signup / login, I have not built this trail from anon users. So at the very least the content reminds me that I need to make this link.
Other than that, I'm very interested in landing pages because I have one market segment that performs alright, but I have people representing other segments who want other versions of what I've done. I need organic search to get them to my product and I need to find out if I can drive them to the existing product before completely building it out. A fake door to some extent.
I have no idea if I can programmatically build landing pages or not, but the insight that compelling organic growth is a mandatory step for a startup to compete with established players is also valuable.
I don't have to need an api to customer analytics and marketing packages to get useful info from this.
edit: I just realized the SUS lecture on instrumentation / analytics was presented by a Segment co-founder.
Pretty light on anything related to "impact".