It's usually more about quality. If the submitted article takes very little editing and has many other considerations already made such as clear audience, commercial post content, clear post intent and SEO then you're much more likely to get accepted / get your article through. Other things like having an existing online audience to share with will also help I think.
But of course, YMMV.
Thanks, nice to keep this in the back of my mind, I've seen worse suggestions for additional revenue sources for freelance devs.
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