If a corporation does not manipulate the market, it will not long survive.
Moreover, its aggressive actions forces competitors to develop counter-measures, leading to advances in marketing. If competitors can't compete, they die.

I don't like Walmart (employees poorly trained and/or lacking the attributes needed for better employment, and concentration on lower and middle range goods; leaving the best to others) so shop elsewhere, but its customers apparently like it because they not only go back but their numbers increase.

In Canada, Walmart purchased the unsuccessful Woolco/Woolworth chain (which also handled the lower range of goods), and are a profitable successor.
Their supermarket (largest of three outlets in Calgary) has popular tenants; a walk-in medical clinic, Tim Hortons, and McDonald's McCafe.