It's all change for Rocket League this December. After four years of monetisation built around randomised loot boxes and DLC, developer Psyonix will soon be jettisoning both.
Rocket League's loot box replacements have already been well-documented, of course. When Psyonix rolls out its new monetisation overhaul some time in December, blind randomised Crates (ie. loot boxes) with pay-to-unlock key mechanics will be replaced by Blueprints. These are rewarded through regular play and, crucially, show players the exact item that will be crafted should they wish to spend premium currency to do so.
Blueprints, however, are only one half of Psyonix's new monetisation plan; December's update will also introduce a premium store where players can, also using the new premium Credits currency, purchase specific items directly.