This is like being married to a partner who happens also to be married to two others, somehow. Oh well, out of sight out of mind.
As long as readers enjoy the writing, the theory being more writers and thus more readers. This might be why Medium is either vague or gives pen names a kind of ‘don’t care’ since pen names probably translate to the growth curve in the blog growth game at this time in the business lifecycle.
Simple, this blog business still has a symbiotic relationship with writers to obtain readership and traffic.