What do you mean by Number of Seats?

The Number of Concurrent Connections onto the Database

Dr Smash doesn’t worry about how many Users your system has or how many PC’s have Dr Smash installed onto them.
We look at the number of people connected to the Database at one time.

If your system is set up with 2 seats you can have 50 users, 17 PC’s but only 2 people logged in at once.

Alternatively, if the system is set up with 17 seats you can have 50 users, 17 PC’s but only 17 people logged in at once.