I would write about related topics on a single website. And I would create multiple websites that cover many topics.

For example, I might create a sight called "Unlimted Runner" and write about running, running gear, races, etc.

I might create a site called "Backyard Guru" where I could write about topics from grilling to backyard games, mowing, sheds, etc.

If you're intereted, I've written abut many of methods in this list: https://medium.com/@christopherkokoski/list/write-make-money-c90f021b3ccd