The free Prime membership, however, is exclusive to front-line workers, the company told Fortune. Corporate employees will still need to shell out the full amount to buy their own subscriptions. However, all employees, both logistics and corporate, will continue to receive 10% off Amazon merchandise, up to a maximum discount of $100 per year.

The wage bump comes as the Big Tech firm expanded its slew of supply chain tools at its Accelerate seller conference in Seattle.

Amazon’s pay rates tend to fall between those of physical retailers — the source of many Amazon recruits — and higher-skilled work in the logistics industry. Walmart Inc.-owned Sam’s Club this week said starting wages would increase by $1, to $16 an hour. Costco Wholesale Corp. raised its starting wage for US workers to $19.50 in July.