No. KahunaCart is sold as a licence, one purchase per site. Each store needs its own licence.
The terms of use set out what a key may be used for:
- A licence key is for the sites it names.
- Do not share it, post it, or use it to run a store for somebody else.
- A key that is being shared is revoked, and the sites using it lose updates and support.
If you build stores for clients, each client's store needs its own licence.
For a question about your own situation, send us a request before you buy.