As someone who also tried and really liked Retool but also found it too expensive I can add my reasoning.

I help companies with digital transformation, what it usually entails is deploying solutions to small teams and then growing them as we get buy in from the business. The initial users are high frequency users of the tools, and later users might be infrequent users.

The problem I found with Retool was that as I scaled to the infrequent users the cost per user remained static, so I would be punished for my tool becoming more popular.