In the imaginary case of the merch selling android app i dont think it is justified to solely blame the developers for the bad product. The root cause for a bad outcome lies in the simple fact that nobody wanted to tell the client that there was already a solution for 20 bucks and absolutely no need for something custom built. NOBODY except the business owner gains anything in this and the client deserves the ripoff too. It comes as no surprise that developers look for interesting challenges without appearing too distracted by the stupid and boring bs work they are stuck with.
Reputation is what gets you more business in the future. You can expand your business or raise rates, or both.
Yes, this won't help if you're literally in danger of not meeting payroll next week, but I would hope most businesses don't operate so close to the edge.
