I just installed it. You are presented with an option to disable telemetry once setup is complete in the form of a CLI command (fig settings telemetry.disabled true). But, for some reason, you can't disable it during setup.
However, during setup, you need to "sign-up" by sharing your email - you can't skip this step as far as I could tell.
> Telemetry: Fig has basic telemetry in order to help us make product decisions. We currently give the you option to opt out of all non-essential telemetry by running `fig settings app.disableTelemetry true`. This removes everything except for one daily ping. We use this ping to help us understand how many people were using Fig.
However, during setup, you need to "sign-up" by sharing your email - you can't skip this step as far as I could tell.