On the webshop it shows "Use this to rocket through prestige levels" please add a note there that this is only for 1 prestige.
The way it was worded made me believe it would be active after each prestige and stop working when you reach max level until you prestige again. As it is for rocketing through prestige levels (Plural).
I feel like I have massively wasted my 10 DP on that item now, thinking me and my friend could do multiple prestige runs with this in our limited time off from work.