"Black Friday Big Spender Event"

I just got all of my tyrants to 8 stars using this method.

Uh... okay then, got the 8th star on the cape, and the 8th AND 9th star on the shoe.

Belt & shoes to 8 stars. Not bad at all.

I must be missing something here.
Isn't guardian scrolls only function to keep valuable scrolls from vanishing when they fail?
So how are these important for getting Tyrant equips to 8 stars? No enhancement scroll would be worth 30k, unless there was such a thing as an 8-star enhancement scroll. (These isn't, is there?)