This comic from PhD comics springs to mind...pic.twitter.com/RJyax9gDJG
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To me it seems like the researchers just wanted something they could put in the paper to get funding for some more research rather than actually trying to answer any questions at all
I think you may benefit from some content/context knowledge here. As far as I know there's really only the one community of people committed to this approach, and they mostly congregate on that Facebook group. I don't know where else one would seek participants.
I agree with your sense of why they wrote the paper though FWIW it's also a pretty patient-centered question. Many people with T1D (including those of us who are skeptical about the claims from that community) would like to see a trial.
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