It mostly boils down to this: delight customers and iterate as fast as you can.
One thing is the product. Another thing is your messaging. Yet another thing is what goes in people's minds when they interact with your product and your messaging. Fourth is how you reason about the complex interactions between the three prior factors.
This categorization helps entrepreneurs with #4. I found it very helpful.
This is maybe the second phase after AWS found a fit and built a consumer base? Once I am in the housing market, I have a need for everything (mortgage, building contractor, construction materials, designer, hardware and accessories, upholstery, decor, etc).
My entry to AWS started with EC2 in the very early days because it of its commodity nature (any size and shape, for however long, with per-minute billing) and instant availability. The elastic nature solved scale. A lot of people didn't move to RDS until later but it was inevitable.
Everything else followed on from there, cross-sells and up-sells for reliability and convenience were always a click away for captive consumers who were already onboarded.