Does anyone know where I could find some stats on the number of active accounts presently versus in 2015, the number of total users gained in the past two years, and other similar data?

Personally, I believe that last year was too soon to have another button; it was too fresh in many people's minds, and it wouldn't have the same appeal as before. However, I'd like to see some of the data I mentioned above; if we were to have enough new people who were willing to participate, it could mean wonderful things for a button 2.0; a new crop of undecided participants, mixed in with the zeal of the veterans, could result in another resounding success.