Re: How to get emotes after progression update?

As I've noticed, sometimes challenges reward you with Emote crates, as is the case with the seasonal challenge "Coatee-Cha Tu Yub Nub". But yes, these challenges are rare, and I'm only missing Hero emotes, so an alternate way of unlocking them would be very welcome. (Though hero emotes are bugged anyway, so it doesn't really matter.)