I applied for the 35K business card (have churned in the past) late last week and got this yesterday:

Dear DOUGOUOLO:

Thank you for applying for a Business Card account. We
are unable to approve your application at this time because
of the following:

o This specific offer is valid only for first-time
CitiBusiness/AAdvantage1 cardmembers. Our records indicate
that you previously had a CitiBusiness/AAdvantage1
account with us.

We appreciate your interest and hope to have the opportunity
to serve you in the future.

Credit Department