Can you elanorate on "Quantity will always beat quality"? In what context?

Let's say I have a service that I offer. if I offer shitty service to a lot of people, sooner or later people will catch up and I'll run out of business.

If I offer many suboptimal products, even if I market it well, people will soon realize it's shit and that whatever I produce is shit even if I might hype it enough to fool some peope into buying it.

If I offer shit information even though I produce a lot, (smart) people will realize I actually have nothing to say.

At least that's my current view.

So please, clarify what you are talking about :).

Cheers.