I resteem the things I do because I interact with a lot of minnows and I tend to like to add things that are helpful to minnows to my portfolio.

If it looks like something that I feel should reach a larger audience (or I frequently refer people to the post) I'll likely resteem it so I can quickly find it again.

I'm nowhere close to curation rewards yet, so I may change my strategy a little as my influence gains power.