It would be one thing if the jobs were all real, but the sad fact is that many of them are not. You go to apply for the job, and you get an email back telling you to sign up for a paid subscription website that will supposedly tell you about more writing jobs. In other words, it's not a real job ad at all- it just a scam to get you to sign up for their useless website.
Over time, I've gotten pretty good at spotting the fake ads, but one of them sometimes slips by me. The easiest way to spot them quickly is that the company's website is too slick, more like an ad than a professional site. It's more like an ad because it is an ad- and the ad is targeting gullible writers. The company doesn't have any other business.
Job ads like this are a waste of time, and a big disappointment if you talk yourself into thinking you might have found something good. The people who place ads like these should be ashamed of themselves.