If you look at these graphs ending in January 2017 I think you’ll agree that a polynomial of degree 3 (cubic) seems like the best fit: https://imgur.com/a/9SlFZd9 .
If that’s right we would expect something like 5,000 members by now.
It occurs to me now that all of these trend-lines are a bit biased towards forecasting rapid growth, as they finish right at the end of the 2016 holiday campaign which absorbed substantial resources. This was the highest period of growth, and likely not sustainable. It might be more reasonable to put the end-date in ~April and then we can fit the trend-line to a less cyclical curve.
Luckily we have metrics that can evaluate goodness of fit and don’t have to rely on our eyeballs. :)
More seriously, thanks a bunch for putting this together. I want to revisit the original growth metrics post sometime in January 2019 (I think Jan-Dec metrics are better than Aug-Jul metrics) and I’ll definitely include this post.
If you look at these graphs ending in January 2017 I think you’ll agree that a polynomial of degree 3 (cubic) seems like the best fit: https://imgur.com/a/9SlFZd9 .
If that’s right we would expect something like 5,000 members by now.
It occurs to me now that all of these trend-lines are a bit biased towards forecasting rapid growth, as they finish right at the end of the 2016 holiday campaign which absorbed substantial resources. This was the highest period of growth, and likely not sustainable. It might be more reasonable to put the end-date in ~April and then we can fit the trend-line to a less cyclical curve.
Luckily we have metrics that can evaluate goodness of fit and don’t have to rely on our eyeballs. :)
More seriously, thanks a bunch for putting this together. I want to revisit the original growth metrics post sometime in January 2019 (I think Jan-Dec metrics are better than Aug-Jul metrics) and I’ll definitely include this post.