"The service is free. Am I the product?"
That is a valid thing to ask. Even with FOSS sometimes.
Some FOSS projects are backed by companies, then yes, plausible to ask.
Otherwise, I would answer with a clear no.
(Projects can still collect telemetry and other data and sell that, though the sell part should be very rare, imo...)
Edit: Was that a bad faith argument or a honest question?
Sometimes I can't tell, maybe because of old or ESL...
Crowd sourced Development and Quality Assurance for something multiple companies, governments and the military are using.
i would default to this being the truth, until demonstrated otherwise. Call it cynical, but it's the cynical that survive.