I am so sorry this happened to you. The same thing happened to me earlier this year after I opened several accounts in Feb/Mar. Shortly after I received the dreaded letter from BOA. Lost a $5.9k CC. Sucks but I despise BOA anyway. Once our mortgage is paid off it'll be good riddance!
Nothing new, BoA is a jealous girlfriend.
Excessive credit seeking is enough for them to break up with a person.
I say good riddance to them.
And it's not like they even offer credit cards that are that good to begin with unless you have $50,000 or more with them.
I'd argue their checking accounts are a better product.