I very much doubt big enterprise clients use the services at bitbucket.com. Standalone is where it is at, and BitBucket (previously Stash) is a worthy competitor to GitLab (which was pain to setup just few years back). Big companies usually don't move at the speed of javascript frameworks.
Hate to be a crotchety old man, but seeing people recruit heavily for JS just makes me like the company less. Really sick of seeing the increasingly-silly bandwagon jumping that goes on in the tech community.