Roblox
1 service across 1 type — orders start at $8.00, then $3.00 / 1,000 at volume
Every order starts at $8.00. That covers the smallest quantity each service accepts, and quite a lot more on the cheaper ones — the per-1,000 rate below is what you pay above it. The order form shows your exact total before you pay.
Grow your audience
People who follow you and stay on your profile.
Followers
Grow the follower count on the profile you link.