Trying to saddle a software product with DRM/copy protection that is just going to piss off your customers doesn’t make you rich. Intuit learned this lesson the hard way.
When Intuit launched the copy-control program, it predicted that revenue would increase, since customers who had previously purchased only one TurboTax program would have to buy a separate copy for each computer in the house. That assumption was dead wrong. Instead, the move triggered a consumer backlash the likes of which Intuit had never seen.