I checked on the business plans and I found that they're referring to 5 licenses of the business edition which permits the user to user Filmora and effects for commericla use. Here's the link: https://filmora.wondershare.com/shop/buy/buy-video-editor.html Select Business and select 5 licenses and it will give you the total of $630 which the amount crossed out on this offer. Basically, is to purchase 5 licenses to use Filmora business and install on up to 5 computers.

I think it's the 5 different effects you see in this video. They are currently selling it as an add-on for $15.

https://www.youtube.com/watch?v=C7mXTXQONb8

The business exclusive set includes Filmora business plan (lifetime access to Filmora video editor), lifetime access to business effect set, and one month subscription to Filmora effects store to download all effects for free.