SaaS can confound Pirates

There is a solution to piracy, having only registered members access to the software which is stored on a server. The SaaS advantage. Only those users who are registered would ultimately gain by it. Stumping the very roots of piracy. But then large organisations prefer licenced sorftware due to third party trust considerations and don't go in for SaaS. Also SaaS is suitable only for certain applications which are costly and hense drive small organisations to adopt them. The pirates could only do well to try and hack the system for which alerts could be set up easily using normal programming practices.