New roblox advertising system

i want to use a limited amount of robux to test out advertising, but the new system says i need to use atleast 5 of those advertising tokens or whatever theyre called, is it even possible for me to use just one of them?

For ad credits it looks like you need to purchase at least 10 credits, coming to the total of 2850 robux or whatever many dollars.

already did that, but i just want to test it out and it says i need to use atleast 5 for a daily fee, 20 for lifetime,