That may not happen. According to various sources fuel sales are not where gas stations make their money. On average they are only bringing in 3 cents of profit on a gallon of fuel. They sell fuel primarily to attract customers and then make their profits on sales of snacks, cigarettes, lottery tickets, and the like. Disrupting the cycle of impulse buys by individuals lured to the store to buy fuel is likely to have a measurable impact on business, but it is unclear if this would drive any/some/most/all convenience stores out of business.