Heh, yeah, it's a blind spot I've had ever since I started my .com site; I forgot that a good reason for it was to bring new people into Steem via SteemPress, and so this might seem like me preaching to the converted.
SteemPress charges 15%, although they do occasionally upvote for a nice chunk too. It's totally worth it for me, unless I continue to blog for a year and end up with no SEO on my .com site. We'll see.
It's all good. If you've found a method that works, and if you're seeing profit from it, then keep it going. Let the money roll in.