I believe this could be a problem in general, but I keep thinking about a recent high profile failure from YC - Homejoy. They had a number of problems with thei

I believe this could be a problem in general, but I keep thinking about a recent high profile failure from YC - Homejoy. They had a number of problems with their platform, but from what I've gathered through the press/blogs is that they focused too much on (geographical) growth after their $38mm round at the expense of fixing issues with quality and their business model (costing them retained users and continued local market growth). I think this is an outlier to Sam's theory, but it also provides some food for thought.