my credit line on my new city Pref is $6500.
I plan to do about $20-25k spend on it a month.
I may try to move cr line from other cards I have with citi. I think if the line is higher, things are better. ie, if you spend $20k, have a line that is closer to that ammt. I think I am going moderately low on this all things considered. But there is no way to know what TOO MUCH is. It is when a company just doesn't wanna pay the bonus any more. I have had citi for years. I have gold, a checking acct that earns TY points, the Premier (spend has been made) and an AA card. i also have savings, two checking and an EQ line with them. THIS MAY help but then again it is all subjective.
My spend is primarily VR and GCs on the TY Pref. I use grocery stores and drug stores... because that's what their promos tell me works for the best points! if they shut me down I will sue their arses so fast it will make their heads spin. then again they are used to that.