No, the model is the product-led growth model. For example, take our BEE Pro product: we do tens of thousands of monthly users of the free editor at beefree.io, of which over 10,000 become free trial users of BEE Pro every month, and of them hundreds convert into paying customers, every month.
Similarly with our embeddable visual builders: you can get started completely free of charge, then move up to a paid plan when you need more. And with this product there are actually many that "need more" from the get-go, so they get in touch with our sales team to make sure that the product is a good fit, do a proof-of-concept at no charge, and then go live.
Thank you so much for sharing the ballpark numbers/percentages of the free->paid funnel. I'm not starting a competing mail application (haha) so my use case might be different but it's very useful for comparison.
And your usage is probably going to ingested by Datatrics (their marketing predictive platrform).