>>626500>>6261368IIRC the actual reason is that The LEGO Group doesn't wanna associate with fastfood chains anymore, which is why the last LEGO-related promotion with actual toys was way back in 2009. The Happy Meal promos for The LEGO Movie and The LEGO Batman Movie are all the doing of Warner Bros.
Although it's also possible that the actual bricks were considered choking hazards, since even in 2009 they had to make large prefab parts.