This can be said about every AI system/software and not just Figma. First the data is gathered for "self-supervised" training. Then, some product is built on top of it to gather users. Once the users show up their data is in turn used to fine tune the system in order to continue gathering data and subscriptions from the users.

The logic of AI companies is very simple and the entire value proposition is in how efficiently the company can convert user data/feedback into features that users will pay for so that the AI company can continue paying their cloud bills.