Had a couple of good gigs in 6 years but for the most part, the gigs are rip-offs.
You really have to be careful when it comes to the writing, most of the writers plagiarize existing articles and use a unicode font (cyrillic) that passes the online plagiarism detectors but since the font they use is a system font, you won't get any of the keywords if you are using it for ANYTHING on the web. Worthless!
If you use the service for links, they will be on sites that don't get indexed or are PBN's which won't pass any rank.
Then, to make things worse, the support staff will do almost nothing to help you get your money back.
When all is said and done, you are better off using a reputable service. It's really not worth the trouble.