Beware of BNA Business solutions! I just had a conversation with them. It's a home based, get rich quick scheme. First, they want your credit card number (a debit card wouldn't do) to determine your credit worthiness. I asked if they needed to know my credit worthiness, why didn't they just didn't run a credit report? I wouldn't let them get to the cost of the business.
The most important thing to remember is the entire scam is a lie. I worked for a company that processed well over 50% of the national credit cards and a large portion of international cards. Visa and Mastercard sets the interchange fees and there is no way that BNA Business solutions will obtain a lower interchange fee just because you start "working for them". It isn't possible.
The company I worked for was First Data and it is huge and well known. Many banks process their cards through it. This outfit had never even heard of First Data. Rather, they just said "we're the 3rd largest processor in the country". Nonsense.
Please, please, protect yourself (and your credit card) and don't fall for this scam. If you are contacted by this outfit, they will harass you nonstop - worse than a collection agent when you do not pay your credit card bill! Just keep hanging up, make sure you are on the do not call registry, and call the FTC and your state Attorney General's Office to file a complaint.
Good luck to you.