I had not seen that. So while not fraudulent, it remains one of the slimiest fine-print practices I have seen. Who else "rounds" up from $1.01 to $2.00 to charge you twice the fee they list? No one that I know of. I happen to like IB overall, but this policy is just robbery.
How much would expect to pay in borrow fee for a $1.01 stock with a listed rate of 5%? Your first guess might be 5% of the position value. If you're a customer of IB, you'd be off by a factor of nearly 100%. When calculating the daily borrow fee, they round each security UP to the next...