Within those 77countries there will be a whole bunch of new and exciting writers who will bring wonderful articles, political insight, cultural understanding etc. Those are the people Medium needs to keep. Alongside them, there will be a whole bunch of people who think Medium is a vehicle for making money.
Which tbf, it can be if you hit the right niche at the right time. Medium has bubbles. Productivity, race-baiting, doom-porn. The herds chase the money and flood the homepage with almost universal identical stories like 'How to get up at 5am and win at life' and 'aren't white people awful' and '40 things men need to know' - they do this not out of conviction but out of opportunism.
If Medium cannot find a way to cultivate the talent, and if their political piece cannot be found because everyone is furiously reading 77 countries new worth of money making 'teen angst', they will go elsewhere. There will be no through-put and the quality will diminish.
Those of us who have been here a while forget the crushing early years experience before we find our readership and our writers. It can be tough for newbies - and we need to find a way to keep them and let them know that quality wins out over popularity. Which, if Zulie is to be believed, is not the case.