Companies tend to focus on the overall % profit margin for a product. If a higher percentage of sales are for a discounted (edu) SKU with lower margins, they will tend to raise the price of the product to hit their desired profit margin.

e.g. If a company was selling a product at $1000, and wanted to offer a 20% discount for EDU that would be bought by 50% of the market, they would need to raise the price by about 10% to keep the same margin. If only 20% of the market bought the discounted SKU, they could keep the same margins with only a 5% (?) increase in price to the rest of the SKUs.