Was there really a data breach?

After the email regarding the recent outage (which seems to be resolved for me), I decided to search through some threads on this subreddit and came across this from about six months ago: https://www.reddit.com/r/SpiderOakOne/comments/1dzr46m/unnerving_if_true_threat_actor_claims_to_sell/

Does anyone know whether or not this supposed breach actually happened? There is very little material online about it.