CompuCredit Denies Credit Cards to People Using Them to Pay for Marriage Counselors

The FTC is suing CompuCredit, a company that provides credit cards targeted to individuals with lower credit scores and poor credit histories.  The system CompuCredit uses to determine eligibility for credit is being questioned.  While the company seems to take into consideration most of the normal factors for obtaining credit- like how long you’ve had credit, whether or not you’ve exceeded credit limits and whether you make your payments on time- they also have some strange factors to determine eligibility.
CompuCredit also factors what people buy with their credit cards to determine whether or not to extend credit to people. Customers who use their credit cards to pay for marriage counselors are denied credit; as are individuals who pay for massage parlors,  billiard halls, or their bar tabs on credit.
It seems credit companies can do whatever they want.  At least the FTC is taking action with a lawsuit against this company for it’s strange approval processes, but I can’t help but wonder how much of this type of “stuff” is factored into our actual credit scores?  If it’s possible for a credit card company to use this information to deny or approve credit, it is probably just as possible for a credit report agency to use such information in the calculation of our credit score or history?