Am I understanding their opt-out requirements [0] correctly: To opt-out of their "optimization" [1] and zero-rating as a content provider, you must not use SSL or UDP and they must be able to identify it as a video?

Does that mean they "optimize" SSL traffic by default?

0: https://www.t-mobile.com/content/dam/tmo/en-g/pdf/BingeOn-Vi...

1: https://www.eff.org/deeplinks/2016/01/eff-confirms-t-mobiles...