I was approved with an $8,000 limit too. Lucky numbers I guess.
I just received the card today. I had to call to activate since the online form was having some difficulties taking my information. I then proceeded to try to register an online account, but I never received the verification code.
I remember reading an earlier post stating that you needed an active checking account to access online banking for the credit card. If you visit the Enrollment page it will allow you to enter the credit card number. Once you provide your details, it will ask you to send a verification e-mail or text. I couldn't do the text as there was no mobile number associated with the account. The e-mail comes up, but I never get the verification code. I called customer service, and someone from the online banking team will get back to me on Monday.