Whether or not that is true now, if banks that were friendly from spammers found themselves suffering major penalties, this implication could be made true.
Unlike the other links in the spam problem, banks have the problem that they can only stay in business if they are seen as legit by legitimate banks, credit card companies, and the like. The same is not true for botnets (illegal), spammers (already breaking the law) or the manufacturers (as long as they have money, they can get supplies, and they are hard to regulate as long as their countries turn a blind eye). But if you're a would be Viagra purchaser, and your credit card won't let you purchase your Viagra, the spammer is out of luck.
Unlike the other links in the spam problem, banks have the problem that they can only stay in business if they are seen as legit by legitimate banks, credit card companies, and the like. The same is not true for botnets (illegal), spammers (already breaking the law) or the manufacturers (as long as they have money, they can get supplies, and they are hard to regulate as long as their countries turn a blind eye). But if you're a would be Viagra purchaser, and your credit card won't let you purchase your Viagra, the spammer is out of luck.