Read this from 2018:
Can I buy 6 seats and not 10, or 21 seats and not 25?
No, you can’t, seats can only be purchased 5 by 5 up to 30, then 10 by 10 up to 100, then 25 by 25 up to 500 then 50 by 50. You can also buy 2-3-4 seats.
I need to add 1 person to our team, not increase the cost by 100%!
I hope this has been fixed, please advise.