Churn Prediction

WTTE-RNN - Less hacky churn prediction
- https://ragulpr.github.io/2016/12/22/WTTE-RNN-Hackless-churn-modeling/
- https://github.com/ragulpr/wtte-rnn/

Analyzing Churn Using the Survivor Model
- https://github.com/aburke99/gdc-analyzing-churn/blob/master/gdc.ipynb