Their success is definitely dependant on people buying (or renting) the units they build. The problem with that is most people are completely clueless about how to look for quality and have no understanding about anything other than the appearance and layout of the units they buy. The same problem exists in the SFH market, lots of really shady developers throw things together with shoddy labour and cheap materials, but disguise it well with nice looking finishes. Not sure there is a solution to that though, people will buy what looks nice and shady developers will always focus on the finishes and not mention the bad foundations or leaky roofs.