Even more so if you've had several hard inquiries in the last several months. (guidantfinancial.com)
Opening multiple credit card accounts at once will result in several hard inquiries to your credit report, which can cause your credit score to drop (at least temporarily). (makelemonade.co)
Within a few days of that account being opened, several hard inquiries for other store cards were made and show up on my credit report, but were presumably denied. (money.stackexchange.com)