@samsox14 unfortunately no, i STRONGLY suggest the devs give 2 options when purchasing diamonds. One to unlock the diamonds for use while under supporter status, and another option to pay maybe 10x more diamonds to PERMANENTLY (not like they say it is) unlock the costume so that you may use it after your supporter runs out.
Ex: a costume that costs 15 diamonds to unlock could potentially be bought and used even without supporter after paying 150 diamonds instead of the original 15