On Jan 1, 2010, at 11:26 AM, Todd Blanchard wrote: > I put the customer's database ID into their serial number so I can track any > key back to the purchaser. I also encode date of issue into the key. If the > key isn't used to authorize the software within three days of issue, it won't > be accepted.
For the user, this is no better than requiring activation or other invasive DRM. What happens when you go under? All your users are no longer able to reinstall your app, because you aren't around to give them a new key. I avoid purchasing products with such activation schemes, because there is a significant risk that I'll lose the ability to use the product down the road, for no good reason. - Ben
