Credit cards have become quite popular as a means of purchasing products from just about anywhere. This easy and convenient line of credit prove to have been one of the reasons why the US may be deep in economic recession. But since then, many people have become wiser and more careful in using this piece of plastic in order to prevent seeing themselves end up too deep in debt and face possible bankruptcy.

But even when more people have become wiser in this regard, credit card issuers still continue to enjoy good business since there are still people who see credit cards as an absolute necessity in these trying times. It may not be harmful having a credit card on hand for emergencies, people would just need to become more careful in trying to use it. This would include knowing what some credit cards may be including in between the lines of certain credit card policies. If you still do not know, there are secrets that many credit cards try to keep that they don't want you to know. Here are just some of them.

Financial screwups do matter.

What concerns most people when it comes to credit cards is the interest rate. Many think that paying regularly and on time would be enough in keeping such rates steady. There is a thing called universal default that can easily affect their card's interest rates. Just not being able to pay that electric bill on time can pout you into universal default. A drop in credit score not associated with paying your bills may be another reason. Although it seems unfair, this can actually happen and can cause interest rates of your credit cards to go up.

They care for your kids, in a different way.

Credit card issuers do care for your children but not in the way that you might think. They see your kids as their future. That is why most credit card companies are now trying to market their products to the younger generation, most notably to college kids who may not yet be considered as financially independent. Credit card companies see this segment of the population as a "viable" risk. There are even a lot of credit card issuers now trying to target high school kids by making it possible for them to apply for credit cards even without parental permission. It's quite a sad but true situation.

Rewards programs come with a catch.

People may prefer certain credit cards for their attractive rewards program and other freebies. But the fact is that such rewards and incentives do not usually come for free. They actually may entice you more to spend just to earn them. And sometimes, such incentives may actually be quite difficult to achieve unless you use your credit card more often.