Ah, I can see how that might be confusing. It means that if you are intending to use it for commercial purposes already then you can test it for 30 days, after which you must either purchase or stop using it. Even though it is a "free" version, you may not continue to use it after that time if your use is of a commercial nature. So it is the same version everyone has access to, it's just that the license terms are different for commercial users.
- Oshyan