Why are the dollar stores “vulture companies”? Costco and Trader Joes only puts their stores in or on the border of higher income neighborhoods. At least Doll

Why are the dollar stores “vulture companies”? Costco and Trader Joes only puts their stores in or on the border of higher income neighborhoods. At least Dollar General is willing to locate their stores near poorer people. Dollar General now has a similar profit margin to Costco: https://www.macrotrends.net/stocks/charts/DG/dollar-general/profit-margins https://www.macrotrends.net/stocks/charts/DG/dollar-general/... https://www.macrotrends.net/stocks/charts/COST/costco/profit-margins https://www.macrotrends.net/stocks/charts/COST/costco/profit... Dollar Tree is slightly higher but much more volatile: https://www.macrotrends.net/stocks/charts/DLTR/dollar-tree/profit-margins https://www.macrotrends.net/stocks/charts/DLTR/dollar-tree/p...