I received a warning letter from Alliant yesterday. Basically they said they did a review of my account and found the activity was not consistent with personal/household usage and went into how it shouldn't be used for business purposes. Concluded by saying they reserve the right to continually review accounts and may close it if they continue to see it used for business purposes.
Have been doing 70-90k/month on it since about August; previously had been doing 20k since I got the card in March (my CL at the time - got it bumped to 30k at my 6 month anniversary; no cycling until Aug).
Any else get the letter? If so, what's your volume like and what is your CL?