Do you offer subscription license that do not has a expiration date?

No.

In contrast to online licensing, subscription license always has a expiration date. This is designed for practical reasons, and please allow us to explain:

In the past, customers who chose permanent license scheme often find that even when they obtain permanent license (which tends to locks to hardware or system signatures), their hardware or system isn't permanent. When the hardware or system breaks, dispute regarding whether or not the software publisher should "re-issue" license (and at what cost?) will arise. It may cost a lot of time and human resource, just in order to sort out the "re-issue dispute", and customers may be asked to prove for the broken hardware. Sometimes this process could be very troublesome and tiring for both parties.

Additionally, such dispute further introduces "hardware or system lifespan", which could potentially be random, into the software license cost equation. Many, including Genius Vision, find this may not be the most fair business model.

The alternative, is to take "system maintenance cost" into consideration. Even though hardware or system lifespan is potentially random, they have an average value. Therefore, subscription license provide an accurate way of such cost measurement. The installer should carefully plan the system, by considering maintenance cost over time, for both hardware and software.

By adopting subscription license, there will be no surprise when system breaks, at least not on the software part.