When you purchase a training service for at least 50 users, you will get a 50% discount on the original user price. When you buy the service for at least 500 users, you will get a 75% discount on the original user-rate.
The discount applies to the total number of users, so you may want to purchase the training for 50 users as soon as you need at least 25 users. This is because the total cost of these users is exactly the same because of the discount. This is our way of scaling the price so it would be reasonable for larger users too.