[whynotmaybe]

Sonarqube/cloud is working the same way.

Community edition with enough features for small businesses.

Once you reach a certain size, you'll need the other features but you now have the money to pay for it and as you've used the community edition for some time, you know that you want this products. (and if the product is deep into your workflow, the cost of change is high that you'll rather pay than switch)

As I'm currently building the stack for my startup, I'm more interested in that model than into a "full features 7 days trial" that then turns into a 19$/m/user.