For what it's worth, Chase WILL adjust their credit handling for a given cardholder.
As part of the Credit Bubble leading up to the 2008 financial crisis, Chase absorbed several CCC, including a couple of mine. I had large open balances and Citi, Chase and BofA did CLD on my accounts. Chase tried to accelerate terms on a particular group of low APR Forever cardholders and ran into a class action lawsuit, so they backed off and only raised the minimum payment to 5% per month. Some other cards of mine they closed. I ended up with an open Freedom card with 13.24% (no change to APR) and a $1,500 CL (CLD from $3,500) and a card converted into Slate with $11k and managing another Forever offer of 4.99%.
So, you see, Chase does watch your account and will make adjustments, only it's more of a noose rather than an expansion 
This is why it pays to approach the Chase bear very carefully, make sure your credit profile is as good as it can be, app for only cards you really can use, and watch the number of Chase cards (relative to other lenders) that you go for.
Again, you don't have to agree with Chase's policies, but you do need to realize they have those policies and act accordingly, act carefully.
@dapps06 wrote:That kind of business practice should disgust literally everyone. If more people did what I'm about to do, closed their accounts, guess what? Chase would abandon this practice in no time at all. As long as they have people making excuses for them they'll continue to act in this manner. I didn't have A lender treat me favorably, I've had every single lender I've dealt with treat me favorably and reward my credit resurgence. THIS is the standard practice, to reward your customers if they show financial responsibility. Chase appears to only be interested in credit if it's inadequate enough to qualify for favorable, from their position, terms. That's not how the credit game is designed, it completely defeats the purpose of the entire system.
Oh dear, where to begin...
First of all, you are taking this way too personally. Chase is a business. I'm going to go out on a limb by assuming that you know the true reason most businesses exist. Hint, it's not to play quid-pro-quo with customers or to reward good/responsible behavior. The latter is what parents do. Business decisions are made by companies everyday that are unpopular with customers, and they fully expect some to be dissatisfied. I'm not sure when this self-entitlement developed, but you are going to be very disappointed in many more situations in life if you can't let trivial matters like this go.
That being said, the cards I have with Chase would be some of the last that I cancel, and I'm a very satisfied customer of theirs. Most of my Chase cards don't even have a range of possible APRs. I assure you, you are not going to hear of very many people outside of credit card forums complaining about Chase's policy on this matter because it's quite negligible.
As you obtain cards from other lenders, you will find out that this "practice" is quite common in the industry. You are asking for more credit, so they could absolutely justify placing a HP on your credit report. There is no requirement for any bank to SP for credit limit increases or to "grow" their cardholders. You are also free to open a bank with the highest of moral standards and start lending your own money without such controls in place.
