We are aware that even if the entire community were to report their numbers, it would not be representative of the entire diabetes community, only of the TuDiabetes members which, by definition are a self-selected group: people who choose to join a social network (can afford to do so, etc.) and participate on it.
This is why we need as many people from the community as possible to participate: so we can paint the most complete picture of the community that we can. We had some discussions about this very topic when we launched:
https://forum.tudiabetes.org/topics/tuanalyze-is-here
and shortly after that:
https://forum.tudiabetes.org/topics/why-do-you-sharenot-share-your