There are plenty of sites that will pay for content. Not a lot of pay but something like associatedcontent.com ...then there are bidding sites like writerlance.com which is free with no membership. From there, you start paying a membership fee for jobs that pay a little more. It really is better to just search some of the writer sites following leads to magazines and what they want.
Insofar as serial fiction, I've not seen people who need it. That's really blog stuff.
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