Hey guys!

I'm new to writing papers for profit, so I thought maybe you all could just give me a few heads up. I tried searching this forum but there's so many mixed feeling I thought I should just start my own thread.
Anyway, I just applied for
CustomWritings.com or AcademicExperts.us....same guys apparently. After searching this forum, I have read some mixed opinions of some people getting paid and others not. So what is it, should I stay for a few weeks and see if they pay me or not or should I just drop them right now and move on?
Second, what are some actual good legitimate sites to work for that will pay(at least most of the time)? I'm not looking to make a lot or go full time here, I'm a student researcher at a university, I don't have all the time in the world..lol :)
Also, how much can I expect to make or rather-how long does it take to make a certain amount? So, let's say my goal is to make some spare bucks, 200 a week, that's all. So, I know you're all going to say, well, how fast you make money depends on how much you write and how good you are. So make an estimate for me, base it on this(haha)-I am a pretty good writer, at least I like to think so since I am an engineering major and I have several papers going through the publishing process.
Thanks in advance!
-Le Aeronautical