Where are the ARAM skin boosts?

"Skin Boosts Temporary random skins for the random champions played by your (sometimes) random teammates. And some IP.

BOOST ME BRO Skin boosts have been permanently enabled on ARAM. They cost 95 RP and grant you and your teammates a one-time random skin for your randomly-selected champion, as well as 100 IP (200 for you)."

I was really looking forward to this but I see no option to enable this in my ARAMs.