Rocket League Trading reported today that the change is coming from xingwang's blog

July 2019.Rocket League's Crate framework is being eliminated for another one: Blueprints. Designer Psyonix Rocket League Trading reported today that the change is coming in December. 

Psyonix declared in August it was eliminating Crates from Rocket League, taking cues from Epic Games with its expulsion of plunder boxes from Fortnite's Save the World. In Rocket League, players will get the opportunity to get Blueprints in the wake of playing matches. These things will show what can be made, and afterward player will pick on the off chance that they need to make it. Players should pay to make the thing utilizing Credits as opposed to buying a key to open a Crate. Credits are the "new exceptional cash" coming to Rocket League with the December update. They can be utilized to make Blueprint things, purchase stuff from the new Item Shop, and move up to Rocket Pass Premium. 

"Like the Crate things that RL Prices went before them, Blueprints can drop with uncommon credits like Painted, Certified, and Special Editions," Psyonix wrote in a blog entry illustrating the framework.