It seemed like such a good plan. For their small businesses, several of our readers use postage printers from DYMO. The software that goes with these printers comes in two versions: free and $10 per month. The free version requires users to round their postage up slightly; the paid version does not. Then the company dropped a new rule on customers: if they want to use the free version of the software, they have to buy their labels from DYMO. If they want to keep using cheaper third-party labels, they have to pay $10/month for the service.