They lost investors because of their own mistakes about making projects based on trial and error and they do not have a real product that can be developed, so it is not surprising when investors are no longer easy to be deceived by scam projects that may still be popping up everywhere, because now they are will only focus on investments that promise large returns in bitcoin and other large altcoins.
Yes you are right, the customer is your banner if he satisfied with the program he will automatically advertise your work, your company
and if you scam his he will speak up where he could maximum.