I’ve never tried writing on other blogging sites. Always assumed there is a bit of an expense to set things up and keep them running in the form of money.
I have wanted to take a few things I have written that have nothing to do with steemit, or cryptocurrency and post them elsewhere as well just to see how they do.
Wanting to create a larger social outreach is something I have not looked much into but I find myself wanting to explore more options. If nothing else but to bring more exposure to my own steemit blogs.
If you're doing it purely for additional social exposure... a WordPress or Blogger blog is a good way to go; generating income from those is a long tedious process, however... until you have a following of 1000s, income is minor. It's a bit like having a YouTube channel... until you have 1000's of viewers, it's slow going.
I still enjoy blogging elsewhere, though... mostly niche stuff there doesn't seem to be that much demand for on Steemit.