The problem will releasing that information is that it gives a huge advantage to fraudsters with limited benefit to legitimate users. Fraudsters will know exactly how much fraud they can commit to stay below the radar, so they'll max out an account while avoiding detection and then move onto another account and repeat. Paypal will then have to reduce their thresholds to minimize fraud and end up hitting far more legitimate customers.
They could perhaps identify the general risk categories (i.e have a list of businesses-type which are considered high-risk). Most merchant account providers maintain such a list and you can easily find examples by googling, but I'm guessing most people who run businesses in high-fraud industries are already aware of that fact.
They could perhaps identify the general risk categories (i.e have a list of businesses-type which are considered high-risk). Most merchant account providers maintain such a list and you can easily find examples by googling, but I'm guessing most people who run businesses in high-fraud industries are already aware of that fact.