I have spent the last 15 years as a professional writer. Blogs, print and also have worked as an editor. I'm no slouch at writing.
After literally hundreds of blogs for these people over three years, hundreds, all rated a "4" - all of them - ONE client rejected an article (after asking for changes that I made per his instructions) and, not being a mind reader, (apparently I didn't get what he meant in his 15 word email) he rejected it. After three years, hundreds of blogs and ONE unsatisfied client I was reduced to a "3" with a congratulatory email -no kidding, it read: "Congratulations! You are now a 3 star writer."
Wha? 3 star writers have a more limited pool of choices for blogs (and they aren't that great to begin with!) and less pay. Because on ONE unsatisfied client.
Actually, that's what cut if for me, although I really should have moved along long before. These people are clearly idiots. Often you find yourself writing blogs that you normally wouldn't because the pool gets so limited. Your "pay" can be sort of decent (it is NEVER good) and don't believe anyone who says you can make a living at this!- but also can be quite paltry. Quite. You are not in control of that either. Many of the blogs ask for "from a Canadian point of view" or such that will discount it for US writers. Many blogs are $1.50 product descriptions. Some client's instructions are filled with grammatical and spelling errors. Some are unclear. Some clients are good ones, but some want "War and Peace" for $6. And TB will expect you to do that. They ask you to include all sorts of things that are not in the realm of "writing". You're actually better off flipping burgers or working at the 7-11 and working on your own blog or novel. Trust me. It will be a lot more dependable.