Oh, they most certainly do. Who doesn't want their work to become a Cash Cow Franchise that people keep utterly obsessing about years or even decades after it came out? It it just costs one little extra effort in term of paying for good writing (we assume good acting and directing are par of the course).

And, of course, the whole art of Hollywood is to make stories that are fun and compelling on many levels, enjoyable to the sharp and the dull in equal measure. Pixar is especially good at that.

TLDR; the reward for good art (whose virtues include being accessible to all and being entertaining and emotionally cathartic) is boatloads of cash. Forever