If you have the time available then posting with a PrimeDice signature. Not sure if you would be able to post enough in your spare time to hit $200, that's about 1100 posts per month at current prices and rates.
I think 1100 per month sounds quite rough, compared to what you'd earn from just having a part time job.
I know he said "Online" but you need to be damn dedicated to reach that
constructivepost count
Constructive posts are easy! They can be one-liners or many paragraphs provided that they relate to the topic or context of the recent posts.
1100 posts is easy going if you browse the forum consistently each day - even easier if you get into interesting conversations or debates with people.
The reason why I suggested doing PrimeDice (or the like) is that:
a) it requires no application process or requirement for ID
b) the user is a member of the forum and community therefore familiar with some of the topics that will be discussed
Sure, on of the drawbacks is the faff in converting your BTC to cash, and that the value could vary dramatically but it's pretty good shout for an online job that pays that sort of figure.
1100 posts a month is roughly 35 a day. Not hard to do every once in a while, but every day seems tricky. Another good way to turn your BTC into cash is to buy mining equipment and then re sell it. Just make sure you buy equipment that everyone whats to get their hands on. Just take a look at place like ebay and the inflated prices people are willing to pay for miners.
You can also make decent money on ebay if you know what you are doing. I knew a guy years ago that was buying stuff at the dollar store and selling it for insane profits just because what he was selling, people couldn't buy where they were.