Not sure if they do this, but I'd actually really like if they included instructions for things you can make with just the brick sets - just to help you get started or to come back to later.
fx with a box of 1000 bricks, instructions for 2 or 3 things that can all be made from the bricks in the box (maybe not all at once)
Can confirm, they do. This set of 1500 pieces, for example, comes with two instruction books with many different small animals you can build with it.
https://www.lego.com/en-us/service/building-instructions/110...
I don't know if they still do, but historically LEGO boxes often include pictures of alternate builds with the same pieces, although including instructions for alternate builds is rare. There's a set of Creator 3-in-1 sets that do.
Not an official site, but Rebrickable has a section for "alternate builds" you can use to repurpose an existing set: https://rebrickable.com/sets/alternates/