Why not? If you have simple idea that organically has lots of demand I would imagine executing cleanly is an advantage. There are plenty of examples: craiglist

Why not? If you have simple idea that organically has lots of demand I would imagine executing cleanly is an advantage. There are plenty of examples: craiglist for classified ads, plentyoffish for dating (or at least used to), gandi for domain registration, github (as opposed to sourceforge which was filled with dark patterns)...