Personally, I don't. I find there are a huge number of topics compared to *other* sites. Some sites ask for articles, stories, etc. on specific topics and you choose one and write your article etc. and send it to them. you wait to see whether they accept it, reject it, or want you to revise it. And some of these sites are quite limited in the number of subjects because they are a specific company. Textbroker, for example, tends to bore its writers. I tried to get on their site but they only accept American residents, so I only know from reading what other writers say.