Indeed, but when you read the article the only "hazards" mentioned are irrelevant if you do not carry a balance:
Read all the articles you want. Law is still what controls. Problem is the Fair Credit Billing Act does not protect you when you use a biz card. Doesn't have much to do with carrying a balance.
Maybe biz card worth using to get a juicy bonus (guilty!); not worth it, IMHO for regular use.