Thanks for the helpful suggestions!
I'd love to apply for the Ink Bold but to me a spend of $10k for 50,000 is just not worth it. With their old $5k offer I would have probably done it.
I'm aware that the Delta offer especially is very low but I figured I might as well apply for it since I didn't see any other AMEX business cards that were better.
What if I combined my United and Continental accounts with Chase and thus had only one personal card with them? Would that make it easier for me to apply for the CSP?