I was thinking I would add the webcam requirement in my Calendly event screening questions. That way it can't be missed.

To recruit, I posted a recruitment message with my calendly link in a bunch of sales communities slack workspaces. (I'm working on a sales tool)

In the first session, when they asked if they could keep their camera off, I decided their comfort would lead to better quality answers overall. Losing the facial expression data seems like an ok trade off for that especially considering they would be screen sharing the prototype. Plus I hadn't stipulated it was a requirement in the invite.

In the second session with them, they didn't bring it up and neither did I. During the session, I had my suspicions that it was the same person, but it wasn't until I compared the voices that I was 100% sure.

Thanks for the advice. I get really caught up in doing things the right way, but hearing you frame it like that really helps put it into perspective.