Market Place Blues

I have been trying to get and find support for some of the items I have downloaded and installed. It seems to me I even found one’s that are paid are all so banned by the dev.

I tied 6 times I had to start my project over because the video tutorials I fount for Inventory systems were also banned by the devs.

Items in Question:

Action RPG Inventory System
RPG Inventory System.

So now I have no idea what to do about an inventory system.