i see a lot of users suggested that you buy a high level account and start with a signature campaign.
while this is a good idea, you can not earn $500 a week with signature campaigns.
look at the rates here for yourself:
https://bitcointalk.org/index.php?topic=615953.0$500 a week is nearly 2
BTC !!
You are right. To be able to get 500 btc in profit that could be income each week is asking a lot.
You would need a sizable investment in something in crypto world to do this. Even then most investments cannot guarantee X income each week.