Hello Readysteady,
I am sorry it took me so long to answer your topic.
We have a minimum of seats because the Silver plan includes a dedicated CSM contact; this job is best for a team starting at this size. While for a smaller project, it will not make sense to have a Customer Success Manager working with 1 or 2 admins.
Is support something you look for?
Because if not, the Bronze plan might be best for you since there is no minimum required for the seats.