Turn your pop up blocker off if you use one. A lot of the credit card offers pop up, if you have a pop up blocker then you might miss it.
If your asked for your full SSN, it might be a hard pull. Some of these websites ask for your full SSN when applying for the store cards, whilst others ask for your last four digits. If it asks for your full SSN it might be a hard pull so be careful. As always, your mileage may vary.