I would say no, but instead give a longer-term period of free upgrades, such as say 3 to 5 years. This is long enough to be seen as a benefit by the customer.

I would say no, but instead give a longer-term period of free upgrades, such as say 3 to 5 years. This is long enough to be seen as a benefit by the customer. Saying "for life" means little when you are a smaller software company, as most have seen one of their favorite applications die on the vine due to the company going out of business.