Articles content writer for gambling

Hi everyone, we are new on Freelancer. This is a low cost project, we need to create gambling related content for our sites in the next month. We can pay 100 USD max for the beginning. We need for 50 original articles, good english (native), original and quality content (Copyscape passed), about 400 words, keywords in title, at least in the first and last paragraphs, delivered in 1 month, 10-15 articles weekly. Writer, must be familiar with gambling and online casino, to focus on the most important topics and keywords phrase (SEO). We are looking for a writer "partner" to create original content for our online network. If this project go well, we can collaborate for more time. We can pay every 10 articles released... or a minimum in advance, as you like it. You are free to choose topics but we have to evaluate the keywords phrase before writing. Please, if you make a bid, provide an example of your writing. Best Regards.