>>10277807sometimes, Bandai gives the distributors leaflets like these (this is for MG way back then, advertising other MG kits)
distributors are required to open each box and put these leaflets one by one.
I believe they mostly stopped doing it because of regions and costs. I mean Bandai got burned pretty hard in the early 90s and late 90s and early 2000s, so they are always cost cutting whenever they can