Software sold via channels like distributors on the Internet. How a software vendor or publisher know how many software has been sold, what is the price for each copy? They just collect money from this channel, and check if the number is correct with what they claim. They do not know the specific number without a dongle, and will fail to know number of copies with out know how to control the license copy with a hardware key.
 
The UniKey family is designed to offer the best method for software copy protection through hardware key based solution to protect software from illegal usage and supply flexible license management and distribution for software vendors.

UniKey Time is specially made for variation of the Max model, contains a tamperproof real-time clock indicating time and date. Ideal for software rentals and subscription-based licensing